Ostorhinchus cyanosoma (Bleeker, 1853)
Yellowstriped cardinalfish
Ostorhinchus cyanosoma
photo by Yin, Robert

Family:  Apogonidae (Cardinalfishes), subfamily: Apogoninae
Max. size:  8 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 1 - 50 m
Distribution:  Indo-Pacific: Persian Gulf (Ref. 68964) and Red Sea south to Mozambique and east to Fiji, north to the Ryukyu and Bonin islands, south to New Caledonia. Recently recorded from Tonga (Ref. 53797).
Diagnosis:  Dorsal spines (total): 8-8; Dorsal soft rays (total): 9-9; Anal spines: 2-2; Anal soft rays: 8-8. Bluish silver in color, with 6 orange-yellow stripes, including a short post ocular stripe. Sub-equal along abdomen, and midlateral stripe ends into pinkish to orange spot on caudal fin base (red at night) (Ref. 48635). Greatest depth of body 2.7-3.0 in SL (Ref. 90102).
Biology:  Inhabits sheltered clear water areas of lagoon and seaward reefs from depths of 1 to at least 49 m. Found in small or large aggregations under ledges, in holes, or even among long spines of sea urchins. Feeds on planktonic crustaceans and small invertebrates. Has been reared in captivity (Ref. 35404).
IUCN Red List Status: Least Concern (LC); Date assessed: 05 February 2021 Ref. (130435)
Threat to humans:  harmless


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