Achiropsetta tricholepis

Common Name

Prickly Flounder

Year Described

Norman, 1930


Dorsal Fin: 123-145
Anal Fin: 106-123
Pectoral Fin: absent
Pelvic Fin: 7 on left side, 6-7 on right side
Gill Rakers: 8-15 (first arch)
Lateral Line Scales: 152-195
Vertebrae: 15-17 precaudal, 48-50 caudal; 64-66 total.

Body fairly elongate and ovoid (depth 2.3-2.8 in SL) with strongly sloped head profile and fairly flat dorsal/ventral profile. Head length 19-23% SL. Eye diameter greater than snout, but less than law length. Posterior margin of jaw reaches the posterior margin of lower eye. Teeth small, slender, and in a single row in both jaws. Anus along midline. Body scales with 1-4 spinules that stick out away from the body. Dorsal fin low with origin anterior to upper eye. Anal fin low with origin posterior to pelvic base. Dorsal and anal fins contiguous with caudal fin. Pectoral fins absent. Caudal fin small and rounded.


Pale gray to brown with small dark blotches on body. Fins unmarked.


Maximum size to 39cm SL.


Upper continental slope from 100-1,020m, over soft bottoms.


Southwestern Atlantic: Argentina to Tierra del Fuego, including the Falkland Islands.


Heemstra. 1990. Achiropsettidae. p. 408-413. In O. Gon and P.C. Heemstra (eds.). Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa.

Other Notes

Mancopsetta argentina (Lahille, 1939) and Achiropsetta heterolepis (Evseenko, 1987) appear to be synonyms of this species.