Crocodile Flathead

The crocodile flathead typically has 11 soft rays in the second dorsal fin and the anal fin. There are 2 spines on the suborbital ridge but no spines to the rear of the eye. The top spine on the preoperculum is relatively long almost extending to the margin of the operculum. There is usually no preorbital spine, although there is sometimes a very small one. There are between 74 and 91 diagonal scale rows above the lateral line. There are typically 7, although there may be one more or one less, gill rakers on the first gill arch. There are no flaps in between the opercula. The overall colour is brownish with a number small dark spots on the upper body and typically there are 4 or 5 dark brown bands crossing the back. The first dorsal fin has a wide black band near its margin with small black spots below that. The other fins have dark spots. This species attains a maximum published length of 50 cm (20 in).

The crocodile flathead was considered to have a wide Indo-Pacific distribution but the revised species is restricted to the western Pacific Ocean in Japan, China and Taiwan. It occurs from close to the shore down to 100 m (330 ft) on substrates of sand or mud. The larvae and juveniles occasionally enter brackish waters in mangroves, particularly the lower reaches.

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