Clarias insolitus is a catfish within the genus Clarias, found in the upper drainage of the Barito River, in Kalimantan, Indonesian Borneo.[1]
It lives in mostly small streams in the Barito Ulu region, literally "upstream Barito". Specific habitat details have not been mentioned .[1]
Collected as recent as 1991, the holotype length was 122.5 mm (or 4.8 inches) in SL, with 7 paratypes collected from the same area ranging from 53.5 to 139.7 mm (2.1-5.5 inches), though it hasn't been inferred about the specimen's matuirty status. The diagnosis has been defined by:[1]
It is further distinguishable from other clariids from the following characteristics (except for C. intermedius, C. meladerma, C. olivaceus, and C. planiceps):
Further characteristics include:
Coloration has been noted to be violet-gray (or plum) in lateral and dorsal areas, with dorsal, anal and pectoral fins with the same coloring, sometimes ranging to translucent near margins. Pelvic fins are translucent. Barbels are violet-gray dorsally, yet paler ventrally (about light gray).