Differs from all other species in having a large dark mark on caudal peduncle forming a complete ring (i.e. going completely around caudal peduncle) and outlined anteriorly as well as posteriorly by complete pale rings. It differs from all species except B. morleti in having dorsal, anal, and caudal fins pale or bright yellow, with distinctive round, oval, or oblong dark spots on caudal fin. It entirely lacks the complete dorsomedian black stripe diagnostic of the species B. morleti. Spots on the caudal fin fewer but larger, and submarginal dark stripe on dorsal and anal fins better defined than in B. morleti (Ref. 31466). Dorsal fin with 8 branched rays; 14-19 narrow irregular bars on side (Ref. 43281).