
Squarehead catfish
Chaca chaca
Chacidae

Chaca chaca
Chacidae
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Oliver KnottJul 22, 2026
Oliver KnottMay 2, 2026
Oliver KnottMay 27, 2025
Oliver KnottJul 23, 2024
Inhabits rivers, beels, canals and ponds. Prefers soft substrates where it lies concealed in the soft mire of the river bed. It depends upon this concealment for protection and will not even move when it is touched lightly. Lies quietly on the bottom until some prey comes along. Apparently a worm-like appendix at the fringe of the mouth is used to attract prey. Fairly common in catches, but is not eaten perhaps due to its ugly appearance.
Temperament, fin nippers, fish that eat other fish, and fish that need the same water. And what the Harmony mark in the app means.
Two aquariums from Southeast Asia: calm forest streams and peat swamps with soft, brown water, and fast mountain streams with cool, oxygen-rich water.
From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.
Why new fish should live in a tank of their own for a few weeks before they move in, what you need, and what to look for.