Overview
Chaca is the only genus in the catfish family Chacidae. These fish are commonly known as squarehead catfishes, frogmouth catfishes, or angler catfishes. These unusual fish have a sedentary lifestyle and spend much of their time motionless.
The name Chaca is because, when removed from the water, they will rapidly repeat the sound "chaca". Only C. chaca makes these sounds; the other species do not.
Species
The four currently recognized species in this genus are:
Chaca bankanensis Bleeker, 1852 (angler catfish)
Chaca burmensis B. A. Brown & Ferraris, 1988
Chaca chaca (F. Hamilton, 1822) (squarehead catfish)
Chaca serica H. H. Ng & Kottelat, 2012
Distribution and habitat
Chaca species are found in fresh water from eastern India to Borneo.
From Wikipedia (CC BY-SA 4.0).