"B. hypselurus" has a smooth posterior edge to its dorsal fin spine, relatively tall neural spines on the caudal vertebrae, a shorter caudal peduncle, a longer snout, greater distance between the eyes, and fewer vertebrae than the other two species. Between "B. insignis" and "B. cessator", "B. cessator" has larger eyes, greater distance between the eyes, and evenly scattered brown spots on the dorsal and pectoral fins, while "B. insignis" has smaller eyes, less distance between the eyes, and the brown spots on dorsal and pectoral fins concentrated in a dark band near the edges. "B. cessator" grows to about 7.5 centimetres (3.0 in) SL. "B. hypselurus" grows to about 12.2 cm (4.8 in) SL. "B. insignis" grows to about 22.0 cm (8.7 in) SL.