Rinoctes nasutus

Common Name

Abyssal Smoothhead

Year Described

Koefoed, 1927


Dorsal Fin: 11-15
Anal Fin: 10-13
Pectoral Fin: 8
Pelvic Fin: 7
Gill Rakers: 20-22 (total in first arch)
Branchiostegal Rays: 6-7

Body elongate and slender, with a large head. Eye diameter shorter than snout length. Snout pointed. Premaxilla, maxilla, dentaries, palatine, and vomer with teeth. Upper jaw hooked in large specimens. Rear margin of jaw extends to anterior or middle of orbit. Two supramaxilla above maxilla. Dorsal fin origin anterior to anal fin origin (anal fin similar in size). Pectoral and pelvic fins fairly large. Scales absent.


Pale yellowish on body with a dark head.


Maximum size to 21.7cm SL.


Benthopelagic to abyssal from 2,000-4,156m.


Gulf of Mexico


McEachran, J.D. and J.D. Fechhelm. 1998. Fishes of the Gulf of Mexico. Volume 1: Myxiniformes to Gasterosteiformes. University of Texas Press, Austin. i-viii + 1-1112.

Whitehead, P.J.P. , M.-L. Bauchot, J.-C. Hureau, J.G. Nielsen and E. Tortonese. 1986. Fishes of the North-eastern Atlantic and the Mediterranean. Vol. I-III. UNESCO. Fishes of the North-eastern Atlantic and the Mediterranean. http://species-identification.org.