''Fissurella barbadensis'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

limpet Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Limpets are members of the class Gastropoda, but are polyphyletic, meaning the various groups called "limpets" descended indep ...

in family

Fissurellidae Fissurellidae, common name the keyhole limpets and slit limpets, is a taxonomic family of limpet-like sea snails, marine gastropod molluscs in the clade Vetigastropoda.Rosenberg, G. (2012). Fissurellidae. Accessed through: World Register of Marin ...

, the keyhole limpets.Rosenberg, G. (2015)
''Fissurella barbadensis''.
In: MolluscaBase (2015). Accessed through: World Register of Marine Species. It is known commonly as the Barbados keyhole limpet and the rugose slit limpet.''Fissurella barbadensis''.
Hardy's Internet Guide to Marine Gastropods. This species is native to the western Atlantic Ocean,
SeaLifeBase. including many islands of the

Caribbean The Caribbean (, ) ( es, El Caribe; french: la Caraïbe; ht, Karayib; nl, De Caraïben) is a region of the Americas that consists of the Caribbean Sea, its islands (some surrounded by the Caribbean Sea and some bordering both the Caribbean Se ...

. This limpet is up to 41 millimeters long.''Fissurella barbadensis''.
Bocas del Toro Species Database. It is generally elliptical in shape. It has irregular ribbing on its shell and an irregular margin. It is gray to pinkish white with purple spots and lines. The internal surface has green and white concentric banding. The "keyhole" at the top of the shell has a green coloration internally. This species lives in the rocky intertidal zone, sometimes in

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. Co ...

References

* Rosenberg, G.; Moretzsohn, F.; García, E. F. (2009). ''Gastropoda (Mollusca) of the Gulf of Mexico'', pp. 579–699 in: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Texas A&M Press, College Station, Texas Fissurellidae Gastropods described in 1791 Taxa named by Johann Friedrich Gmelin {{Fissurellidae-stub