''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. Some ''Didemnum'' species, including ''

Didemnum vexillum ''Didemnum vexillum'' is a species of Colony (biology), colonial tunicate in the family (biology), family Didemnidae. It is commonly called sea vomit, marine vomit, pancake batter tunicate, or carpet sea squirt. It is thought to be native to J ...

'' and ''

Didemnum perlucidem ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' are considered

invasive species An invasive species otherwise known as an alien is an introduced organism that becomes overpopulated and harms its new environment. Although most introduced species are neutral or beneficial with respect to other species, invasive species ad ...

. In early 2006, ''Didemnum vexillum'' was found covering a 230 km² area of cobble habitat in Georges Bank off the coast of New England, and is classified as an invasive species of greatest concern in coastal areas throughout Europe, New Zealand, and North America. ''Didemnum'' sp. invasions have also been recorded in Canada, the Mediterranean, and the Netherlands. Species in this genus can be found in tropical or temperate regions. Some tropical species such as ''

Didemnum molle ''Didemnum molle'' is a species of colonial tunicate in the family Didemnidae. It is commonly known as the tall urn ascidian, the green barrel sea squirt or the green reef sea-squirt. It is native to the Red Sea and the tropical waters of the ...

'' have photosynthetic algae in their tunics.

Species

The following species are recognised in the genus ''Didemnum'': *''

Didemnum abradatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum ahu ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum albidum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum albopunctatum'' *''

Didemnum algasedens ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum amethysteum'' *'' Didemnum amourouxi'' *''

Didemnum apersum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum apuroto ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *'' Didemnum arancium'' *'' Didemnum aratore'' *''

Didemnum asterix ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum astrum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum augusti ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum aurantiacum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum aurantium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum aures ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum bentarti ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum beringense ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum biglans ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum biglutinum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *''

Didemnum bimasculum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies. S ...

'' *'' Didemnum bisectatum'' *''

Didemnum brevioris ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum caesium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum calliginosum'' *'' Didemnum candidum'' *''

Didemnum captivum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum carnulentum'' *'' Didemnum carpenteri'' *''

Didemnum caudiculatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum cerebrale ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum chartaceum ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *''

Didemnum chilense ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum cilicium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum cineraceum'' *'' Didemnum clavum'' *''

Didemnum coccineum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum commune'' *''

Didemnum complexum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum conchyliatum'' *'' Didemnum congregatum'' *''

Didemnum contortum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum coralliforme'' *''

Didemnum coriaceum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum corium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum crescente ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum cuculliferum'' *'' Didemnum cygnuus'' *'' Didemnum dealbatum'' *'' Didemnum delectum'' *'' Didemnum densum'' *''

Didemnum dicolla ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *''

Didemnum diffundum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum digestum'' *'' Didemnum diversum'' *''

Didemnum dolium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum domesticum'' *'' Didemnum drachi'' *''

Didemnum duplicatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum ectensum'' *'' Didemnum edmondsoni'' *'' Didemnum edwardsi'' *''

Didemnum effusium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum elikapekae ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum elongatum'' *''

Didemnum epikelp ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum etiolum'' *''

Didemnum extensum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum fibriae ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum filiforme ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum flagellatum'' *'' Didemnum flammacolor'' *''

Didemnum flavoviride ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum fragile ''Didemnum fragile'' is a species of Tunicate, sea squirt in the family Didemnidae. Research ''Didemnum fragile'' is of medical interest as it contains shishijimicin molecules, which have been seen to have potent anti-tumor activity in HeLa ce ...

'' *'' Didemnum fragum'' *'' Didemnum fucatum'' *''

Didemnum fulgens ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum fuscum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum galacteum'' *'' Didemnum gayanae'' *'' Didemnum gemmiparum'' *''

Didemnum gigas ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum gintonicum'' *'' Didemnum globiferum'' *'' Didemnum grande'' *''

Didemnum granulatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum granulosum'' *'' Didemnum guttatum'' *'' Didemnum halimedae'' *'' Didemnum helgolandicum'' *''

Didemnum herba ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum hiopaa'' *'' Didemnum immundum'' *'' Didemnum inaequilobatum'' *'' Didemnum inauratum'' *'' Didemnum incanum'' *'' Didemnum inveteratum'' *''

Didemnum japonicum ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *'' Didemnum jedanense'' *'' Didemnum jeffreysi'' *'' Didemnum jucundum'' *'' Didemnum karlae'' *''

Didemnum kelleri ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum kurilense ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum lacertosum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum lacustre ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum lahillei'' *''

Didemnum lambertae ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum lambitum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum leopardi'' *''

Didemnum leopardum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum levitas'' *'' Didemnum ligulum'' *'' Didemnum lillipution'' *'' Didemnum linatum'' *'' Didemnum linguiferum'' *''

Didemnum lissoclinum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum lithostrotum'' *'' Didemnum longigaster'' *'' Didemnum lutarium'' *''

Didemnum macrosiphonium ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum macrospiculatum'' *'' Didemnum maculatum'' *'' Didemnum maculosum'' *'' Didemnum madagascariense'' *'' Didemnum madeleinae'' *'' Didemnum magnetae'' *'' Didemnum mantile'' *''

Didemnum megaductus ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum megasterix'' *'' Didemnum mekeald'' *''

Didemnum membranaceum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum mesembrinum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum microthoracicum'' *''

Didemnum millari ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum minisculum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum minispirale'' *'' Didemnum misakiense'' *''

'' *'' Didemnum monile'' *'' Didemnum montosum'' *'' Didemnum moseleyi'' *'' Didemnum multiampullae'' *'' Didemnum multispirale'' *''

Didemnum mutabile ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum nambucciensis'' *'' Didemnum neglectum'' *'' Didemnum nekozita'' *'' Didemnum nigricans'' *''

Didemnum nigrum ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *'' Didemnum nivale'' *'' Didemnum nocturnum'' *'' Didemnum oblitum'' *'' Didemnum obscurum'' *'' Didemnum ossium'' *'' Didemnum paa'' *'' Didemnum pacificum'' *'' Didemnum papillatum'' *'' Didemnum parancium'' *'' Didemnum parau'' *'' Didemnum pardum'' *'' Didemnum partitum'' *'' Didemnum parvum'' *'' Didemnum patulum'' *''

Didemnum pecten ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum pellucidum'' *''

Didemnum perlucidum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum perplexum'' *'' Didemnum perspicuum'' *'' Didemnum peyrefittense'' *'' Didemnum pica'' *'' Didemnum pitipiri'' *'' Didemnum plebeium'' *'' Didemnum poecilomorpha'' *''

Didemnum polare ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum precocinum'' *''

Didemnum protectum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum psammatodes ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum pseudobiglans'' *'' Didemnum pseudofulgens'' *'' Didemnum pseudovexillum'' *'' Didemnum quincunciale'' *''

Didemnum recurvatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum risirense'' *''

Didemnum roberti ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum rochai'' *''

Didemnum rodriguesi ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *''

Didemnum romssae ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum roseum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum rota ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum rottnesti ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum rubeum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum sachalinense'' *'' Didemnum sanakiensis'' *'' Didemnum santaelenae'' *'' Didemnum scopi'' *'' Didemnum semifuscum'' *'' Didemnum siphonale'' *''

Didemnum sordidum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum spadix ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum speciosum'' *'' Didemnum sphaericum'' *'' Didemnum spongioides'' *'' Didemnum spumante'' *'' Didemnum spumosum'' *'' Didemnum stercoratum'' *'' Didemnum stilense'' *'' Didemnum stragulum'' *'' Didemnum studeri'' *'' Didemnum subflavum'' *''

Didemnum subtile ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum sucosum'' *''

Didemnum tabulatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum tantulum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum tapetum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum tenue'' *'' Didemnum ternerratum'' *'' Didemnum tetrahedrum'' *'' Didemnum theca'' *'' Didemnum thomsoni'' *'' Didemnum tigrinoides'' *''

Didemnum toafene ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum tonga ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum torresii'' *''

Didemnum tortile ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum translucidum'' *'' Didemnum transparentum'' *'' Didemnum trispirale'' *'' Didemnum tuberatum'' *'' Didemnum tumulatum'' *''

Didemnum usitatum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

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Didemnum uturoa ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *''

Didemnum vahatuio ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *'' Didemnum valgum'' *'' Didemnum vanderhorsti'' *''

Didemnum velans ''Didemnum'' is a genus of colonial tunicates in the family (biology), family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or ...

'' *'' Didemnum velum'' *''

Didemnum verdantum ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum vermiforme'' *''

Didemnum vesica ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

'' *'' Didemnum vesperi'' *''

'' *'' Didemnum via'' *'' Didemnum viride'' *'' Didemnum vulgare'' *''

Didemnum yolky ''Didemnum'' is a genus of colonial tunicates in the family Didemnidae. It is the most speciose genus in the didemnid family. Species in this genus often have small calcareous spicules embedded in the tunic and form irregular or lobed colonies ...

References

* (USGS) National Geologic Studies of

Benthic The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "t ...

Habitats In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

, Northeastern United States has a Marine Nuisance Species page dedicated to this genus Enterogona Tunicate genera Taxa named by Marie Jules César Savigny {{tunicata-stub