Bathypterois dubius

Common Name

Dubious Spiderfish

Year Described

Vaillant, 1888


Dorsal Fin: 14-16
Anal Fin: 8-10
Pelvic Fin: 8 (first two thickened and elongate)
Pectoral Fin: two tiny rays; then 2 rays thickened and elongate; then 1-4 tiny rays; then 9-11 joined rays of moderate length
Branchiostegal Rays: 13
Gill Rakers: 12-14 on epibranch, 1 on corner, and 28-30 lower (first arch)
Lateral Line: 59-63
Vertebrae: 61-65

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 short ventral section. Ventral fins with first rays thickened and elongate (up to half of SL). Anal fin origin under last ray of dorsal fin. Lowermost caudal fin principle rays are slightly elongate (much less than SL). Sub-caudal notch present. Adipose fin present. Body scales small and simple.


Body and head black, with pale edges to scale pockets. Fins dark to black.


Maximum size to 205mm SL.


Continental slope and rise from 750-1941m over soft bottoms.


Northwestern Atlantic: a single record from south of Newfoundland.


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.

Other Notes

Related to Bathypterois phenax of the tropical W. Atlantic and B. atricolor of the tropical E. Atlantic.