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Ocellated Featherback

Chitala ornata

Also known as: Clown featherback fish, Clown knifefish, Spotted knifefish

A prehistoric river predator that grows far larger than most tanks can handle.

Ocellated Featherback
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© Nonn Panitvong/Siamensis.org · Via SeriouslyFish.com (educational / non-commercial use)

About

The ocellated featherback (Chitala ornata) is one of those fish that stops people in their tracks at the fish store, usually when it's still a juvenile and fits comfortably in a display tank. The reality is that this species grows into a genuinely large predator, and that gap between first impression and adult size is responsible for a lot of rehoming headaches. Native to the river systems of Southeast Asia, including the Mekong, Chao Phraya, and Meklong basins, this fish inhabits large and medium-sized rivers, moving into flooded forests during the wet season to feed and, in the wild, to spawn. It's an obligate air-breather, so you'll see it making regular trips to the surface. Identification is worth knowing: the ocellated featherback has large, ringed spots running above the base of its long anal-fin, which distinguishes it from close relatives. Its body has that characteristic knifefish silhouette. Humped back, long flowing underside fin, and a way of moving that looks almost sculptural. Temperament-wise, it's workable with fish too big to swallow, but territorial with its own kind and similar-shaped species. Albino and leucistic forms have been bred for the hobby, and the species is listed as beginner-level, though its eventual size means tankmate choices and long-term planning matter more than basic water chemistry.

Frequently asked questions

How big does the Ocellated Featherback get?
The Ocellated Featherback reaches about 23.5–39.5" as an adult.
What water parameters does the Ocellated Featherback need?
The Ocellated Featherback does best with a temperature of 68–82°F, a pH of 6–8, hardness around 2–15 dGH.
Is the Ocellated Featherback aggressive?
The Ocellated Featherback is aggressive and is best kept alone or with robust tankmates that can hold their own.
What does the Ocellated Featherback eat?
The Ocellated Featherback is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.