Clarias planiceps is a species of clariid catfish from Borneo. It is known from tributaries all over Sarawak, and possibly up to Kapuas Hulu Regency.
It can be found in slower parts of relatively fast-flowing streams with mud or sand as substrate. The holotype has been described from Belakin, with paratypes found all over Sarawak's first, second, and third division[1]
Collected in 1994, the holotype was noted to be of 106.5 mm in length (10.65 cm) from skull to caudal fin, with 97 corresponding paratypes ranging from 46.9 to 297.3 mm (4.7–29.73 cm), therefore possibly including juveniles. The diagnosis of this species are defined by the following characters:[1]
Other noticeable features also include:
Preserved specimens have been noted to be of darker purplish-brown, with the common paler underside. A row of faint and small white spots also runs along the body below the lateral line, with another 10-14 transverse rows extending towards the upper part of the body. Dorsal and anal fins are of body color, with pelvic and pectoral fins opaque white, somewhat translucent.