Gaidropsarus pakhorukovi

Common Name

Argentine Rockling

Year Described

Shcherbachev, 1995


Dorsal Fin: 62 (third fin)
Anal Fin: 51
Pectoral Fin: 25-26
Pelvic Fin: 7-8
Gill Rakers:
Vertebrae: 46-47 total

Body very elongate and tapering posteriorly. Head about one fifth of standard length. Eye less than 20% HL. Upper jaw projects slightly. Rear of jaw reaches about to rear margin of eye or slightly short of it. Teeth present on premaxilla, vomer, and dentary. Two distinct barbels on snout adjacent to anterior nostrils. Snout barbels about 15% of HL. A single chin barbel. There are three dorsal fins: the first a single short pseudospine (< eye diameter), the second a series of very short hairlike rays lacking membranes, and the third a long and low fin consisting of membrane bound segmented rays. First dorsal fin rests in a groove on top of head. Anal fin long and low with origin well behind D3. Pectoral fin large. Pelvic fin with second ray more elongated than rest. Tail rounded and separated from D3 and anal fins. Body scaled. Head naked. Lateral line interrupted and distinctly notched under anterior third of D3. Pores present on head.


Described as uniformly brownish-gray grading to paler ventrally. Fins gray.


Holotype measures 28.8cm SL.


Occurs on the bottom from 770-1010m.


Known only from the Rio Grande Rise off Argentina.


Balushkin, A.V. 2009. On the first occurrence of the rockling Gaidropsarus pakhorukovi Shcherbachev (Gairdropsarini, Lotidae, Gadidae) and on species diagnostics of G. pakhorukovi and G. parini Svetovidov. Journal of Ichthyology, 49(9), 723-729.

Shcherbachev, Y.N. 1995. New species of rockling, Gaidropsarus pakhorukovi (Gadidae), from the Rio Grande Rise (Southwest Atlantic). Journal of Ichthyology, 35(8), 233-235.

Other Notes

Closely related to the SE Pacific Gaidropsarus parini but differs in the length of the upper jaw and snout barbel length (~25% HL vs. ~15% HL). As far as known these two species are allopatric in distribution.