Alternating dark and light stripes along body, with five full dark stripes. Mid stripe ends in diffuse black spot on tail base. Very similar O. nigrofasciatus (Blackstriped Cardinalfish) lacks narrow white margin around black spot on tail base.
Short description - Dorsal spines (total): 8; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8. Whitish with 5 horizontal stripes (brassy to dark brown in color); dark spot at base of middle caudal fin rays; fin rays light red. Greatest depth of body 2.7-3.2 in SL. Dorsal-fin rays VII-I, 9; anal-fin rays II, 8; pectoral fin rays 14; pelvic fin rays I, 5; pored lateral line scales 24; predorsal scales 4; circumpeduncular scales 12; total gill rakers 19, developed gill rakers 14; body white colored, with five poorly defined dark brown stripes on lateral surface of body, posterior end of third stripe reaching black spot on base of caudal fin; base of caudal fin with spot subequal in size to pupil.
Max Size: 11 cm.
Broadstriped cardinalfish's Behavior & Ecology
Commonly found in clear-waters of seaward reefs; on reef crests and slopes, where usually shallow, and along deep drop-offs to 25 m and cryptic under ledges or in holes by day.
Broadstriped cardinalfish's Feeding
Feeds on polychaetes and other small benthic invertebrates at night.
Broadstriped cardinalfish's Reproduction
Mouthbrooders. Distinct pairing during courtship and spawning.