Barathronus bicolor

Common Name

Bicolored Blindfish

Year Described

Goode & Bean, 1886


Dorsal Fin: 62-78
Anal Fin: 51-59
Pectoral Fin: 22-25
Pelvic Fin: 1
Caudal Fin: 9-10
Gill Rakers: 28-33
Vertebrae: 70-75 (31-35 precaudal)

Elongate and translucent, with loose gelatinous skin. Head larger and broader than the body. Eyes not apparent and degenerate. 1-5 fangs on vomer and 1-6 fangs on dentary. Teeth present on palatine (1-2 fangs). No ventral flexure on anterior vertebral column. No lobes at the base of penis. Body scaleless. Dorsal and anal fins continuous with caudal fin.


Body pale and translucent with dark pigment often present on the head, predorsal area, lower jaw, and in the gut region. Peritoneum very dark to black with lateral streaks of dark pigment.


Adults range from 58-140mm SL.


Benthic at bathyal depths (366-914m). Larvae may occur off the bottom.


Widespread in the Gulf of Mexico and the Caribbean Sea. Also known from off Brazil (Franco et al., 2007).


Franco, M.A., P.A.S. Costa, and A.C. Braga. 2007. New records of Aphyonidae (Teleostei: Ophidiiformes) from the south-western Atlantic. Journal of Fish Biology (2007) 71: 908–912.

Nielsen, J. G. 1969. Systematics and biology of the Aphyonidae (Pisces, Ophidioidea). Galathea Report v. 10: 7-90, Pls. 1-4.

Nielsen, J. G. 1984. Two new, abyssal Barathronus spp. from the North Atlantic (Pisces: Aphyonidae). Copeia 1984 (no. 3): 579-584.

Nielsen, J. G., Mincarone, M. M., & F. Di Dario. 2015. A new deep-sea species of Barathronus Goode & Bean from Brazil, with notes on Barathronus bicolor Goode & Bean (Ophidiiformes: Aphyonidae). Neotropical Ichthyology, 13(1), 53-60.