New Cetopsidium catfish named

922e53a8-2021-47f7-b931-21ee628016c9

Editor's Picks
Features Post
What caused this snail die-off?
04 January 2022
Fishkeeping News Post
Nanochromis transvestitus
04 January 2022
Features Post
How do I feed these tricky gobies?
04 January 2022
Features Post
Should I add sand for my Rams?
04 January 2022
Features Post
How to set up your Christmas tank
20 December 2021


American ichthyologists Richard Vari and Carl Ferraris have described a new whale catfish from the Takutu River drainage of southwestern Guyana in a recent issue of the journal Neotropical Ichthyology.

Naming the new catfish Cetopsidium soniae after Swiss ichthyologist Sonia Fisch-Muller, the authors distinguish the new species from congeners in details of pigmentation, the length of the pelvic fin, the form of the first rays of the dorsal and pectoral fins in mature males, the relative alignment of the dorsal and ventral profiles of the postdorsal portion of the body, the position of the anus, and the depth of the body.

At the time of collection, the type locality was 1.5 m deep, with the substrate consisting of sand, gravel, and woody debris.

For more information, see the paper: Vari, RP and CJ Ferraris Jr (2009) New species of Cetopsidium (Siluriformes: Cetopsidae: Cetopsinae) from the upper rio Branco system in Guyana. Neotropical Ichthyology 7, pp. 289"293.