Ostorhinchus ocellicaudus (Allen, Kuiter & Randall, 1994)
Tail-eye cardinalfish
photo by Allen, G.R.

Family:  Apogonidae (Cardinalfishes), subfamily: Apogoninae
Max. size:  5 cm SL (male/unsexed)
Environment:  demersal; marine; depth range 15 - 30 m
Distribution:  Indo-West Pacific: Ashmore Reef, Timor Sea and Maumere Bay, Flores, Indonesia and Philippines; also known from Papua New Guinea, Solomon Islands, Fiji and Australia (Ref. 90102).
Diagnosis:  Dorsal spines (total): 8-8; Dorsal soft rays (total): 9-9; Anal spines: 2-2; Anal soft rays: 8-8; Vertebrae: 24-24. This species is distinguished by having D VII-I,9; A II,8; pectoral rays 14; lateral line scales 24; predorsal scales 5; gill rakers 3+15 (rarely14), excluding 2-3 rudiments on upper limb; preopercular margin serrate; preopercular ridge very weakly serrate around angle; body depth 2.9-3.4 in SL; semi-transparent in life with blackish tripe on snout and prominent ocellated black spot covering most of the caudal-fin base (Ref. 11893).
Biology:  Occurs on sand or rubble slopes. Seen during the day around ledges at the base of large coral formations. In pairs or groups (Ref 90102).
IUCN Red List Status: Least Concern (LC); Date assessed: 05 February 2021 Ref. (130435)
Threat to humans:  harmless


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