The Sailfin snake-eel (Letharchus rosenblatti) also known as the Black sailfin eel in Mexico,Common names of Letharchus rosenblatti at www.fishbase.org.) is an eel in the family Ophichthidae (worm/snake eels).Letharchus rosenblatti at www.fishbase.org. It was described by John E. McCosker in 1974.McCosker, J. E., 1974 (18 Oct.) [ref. 2933] A revision of the ophichthid eel genus Letharchus. Copeia 1974 (no. 3): 619-629. It is a marine, tropical eel which is known from the eastern central and southeastern Pacific Ocean, including Colombia, Ecuador, Costa Rica, Panama and Mexico.Letharchus rosenblatti at the IUCN redlist. It dwells at a depth range of , and inhabits sand sediments. Males can reach a maximum total length of .
Due to a lack of known major threats and lack of observed population decline, the IUCN redlist currently lists the Sailfin snake-eel as Least Concern.
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