Clarias pseudonieuhofii

Described in 2004, the holotype for this specimen was noted to be of a length of 311 mm (31.1 cm) from skull to caudal fin, with 10 paratypes recorded to range from 230 to 316 mm (23-31.6 cm). This species is distinguishable from most other Southeast Asian forest Clarias species (except C. nieuhofii) by the combination of the following characters:^[2]

• an anguilliform body with a short and narrow head
• small laterally-placed eyes.
• occipital process more or less angular and very short
• maxillary barbels reaching level of dorsal fin origin
• possessing pelvic fins as well as pectoral fins and spine relatively short compared to other Asian Clarias species
• above lateral line with 12-15 transverse rows of small white spots, sometimes difficult to observe.

Clarias pseudonieuhofii differs from C. nieuhofii by a shorter anal fin, a longer pelvic fin, and a shorter occipital process, all in somewhat slight measurements.

In living specimens, the skin has been noted to be of dark brown to black, with deeper colors on the dorsal surface of the body and the paired fins. The ventral surface is light brown. Overall, coloration is also somewhat similar to C. nieuhofii, hence the name.

• Clarias nieuhofii
• Clarias kapuasensis
• Clarias pseudoleiacanthus
• Clarias batrachus