''Apletodon incognitus'' is a species of

clingfish Clingfishes are fishes of the family Gobiesocidae, the only family in the order Gobiesociformes. These fairly small to very small fishes are widespread in tropical and temperate regions, mostly near the coast, but a few species in deeper seas or ...

of the family Gobiesocidae. The species is endemic to north-eastern

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

to north-western

Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea ...

. The juvenile fish which measure around standard length (SL) are frequently recorded as having an association with sea urchins and in beds of '' Posidonia oceanica''. The adults hide under stones covered with red coralline algae and in the empty shells of mussels near beds of '' Posidonia'' and ''

Cymodocea nodosa ''Cymodocea nodosa'' is a species of seagrass in the family Cymodoceaceae and is sometimes known as little Neptune grass.

''. Within the beds of ''Posidonia'' it is often found in

sympatry In biology, two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter one another. An initially interbreeding population that splits into two or more distinct species sh ...

with ''

Opeatogenys gracilis ''Opeatogenys gracilis'' is a species of clingfish from the family Gobiesocidae which is found in the Mediterranean Sea and in the eastern Atlantic Ocean. Suggested common names for this species are the ''pygmy clingfish'' and the ''seagrass cli ...

''.

References

{{Taxonbar, from=Q2017087 incognitus Fish described in 1997