Bathypterois longipes

Common Name

Abyssal Spiderfish

Year Described

G√ľnther, 1878


Dorsal Fin: 12-14
Anal Fin: 9-10
Pelvic Fin: 8-9 (first two thickened and elongate)
Pectoral Fin: two tiny rays; then 2 rays thickened and elongate; then 1-3 tiny rays; then 9-11 joined rays of moderate length
Branchiostegal Rays: 11-13
Gill Rakers: 12 on epibranch, 1 on corner, and 27-29 lower (first arch)
Lateral Line: 54-58
Vertebrae: 52-55

Body fairly elongate with a tiny eye and a large mouth. Teeth small. Pectoral fin in two parts, with several elongate rays extending beyond caudal fin base and a long ventral section extending to beyond dorsal fin. Ventral fins with first rays thickened and elongate (less than SL). Anal fin origin under middle rays of dorsal fin. Lowermost caudal fin principle rays are slightly elongate (much less than SL). There is no sub-caudal notch. Adipose fin present. Body scales small and simple.


Body and fins black, with scale pockets outlined in white. Fin membranes pale.


Maximum size to 250mm SL.


Benthic on the abyssal plain from 2,600-5,600m.


Off the eastern U.S. and from S. Brazil to Uruguay. Props itself up on pelvic and caudal rays.


Franco, M.A., A.C. Braga, G.W. Nunan, & P.A. Costa. 2009. Fishes of the family Ipnopidae (Teleostei: Aulopiformes) collected on the Brazilian continental slope between 11 degrees and 23 degrees S. J. Fish Biol. 75(4): 797-815.

Sulak, K. J. 1977. The systematics and biology of Bathypterois (Pisces, Chlorophthalmidae) with a revised classification of benthic myctophiform fishes. Galathea Report v. 14: 49-108, Pls. 1-7.

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.