Author: Tan & Ng, 1996
Comments: Inhabits stenotopic to peats (Ref. 57235).  Collected from shallow blackwaters in a peat swamp heavily disturbed by logging activities.  Feed mainly on insect larvae, with adults eating fish instead.  Previously known as <i>O. leiacanthus</i> newly described by Tan & Ng (1996) (Ref. 57235).