Table 1.

The morphological characteristics of three species of Butis genus.

Species	Morphological characteristics
Butis koilomatodon [37]	The body colour is pale beige to greyish beige. The head and body are relatively short. There are four to six dark-brown bands on the body and one dark band on the caudal peduncle. The snout is serrated. Melanophores were scattered on the body and dense at the pectoral, caudal fin bases, and pelvic fin.
Butis humeralis [38]	The body is blackish, and the head is long, pointed, and relatively depressed. The caudal peduncle is relatively deep. Melanophores are covered throughout the fish body, notably in the first and second dorsal, pelvic and anal fins, and pectoral and caudal fin bases.
Butis butis [39]	The colour of the body is blackish. The head is relatively depressed with the long and pointed snout. The caudal peduncle is slender. Melanophores are dense at the bases of pectoral and caudal fins, but scattered on opercula; first and second dorsal and anal fins.