''Ichthyapus keramanus'' is a

species In biology, a species is the basic unit of Taxonomy (biology), 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 ...

snake eel Ophichthidae is a family of fish in the order Anguilliformes, commonly known as the snake eels. The term "Ophichthidae" comes from Greek ''ophis'' ("serpent") and ''ichthys'' ("fish"). Snake eels are also burrowing eels. They are named for their ...

native to the western

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...

where it is only known to occur around the

Kerama Islands The are a subtropical island group southwest of Okinawa Island in Japan. Geography Four islands are inhabited: Tokashiki Island, Zamami Island, Aka Island, and Geruma Island. The islands are administered as Tokashiki Village and Zamami V ...

near

Okinawa is a prefecture of Japan. Okinawa Prefecture is the southernmost and westernmost prefecture of Japan, has a population of 1,457,162 (as of 2 February 2020) and a geographic area of 2,281 km2 (880 sq mi). Naha is the capital and largest city ...

, Japan. It is known to occur at depths of from . This species can reach a length of TL. This species is placed in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

Ichthyapus ''Ichthyapus'' is a genus of eels in the snake eel family Ophichthidae. Species There are currently 7 recognized species in this genus: * ''Ichthyapus acuticeps'' Keppel Harcourt Barnard, Barnard, 1923 (Sharpnose sand eel) * ''Ichthyapus insular ...

''.McCosker, J.E. & Hibino, Y. (2015): A review of the finless snake eels of the genus ''Apterichtus'' (Anguilliformes: Ophichthidae), with the description of five new species. ''Zootaxa, 3941 (1): 49–78.''

References

Ophichthidae Fish described in 1997 {{Anguilliformes-stub