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Rhabdamia gracilis (Bleeker, 1856) Luminous cardinalfish |
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photo by
Andy Cornish@114°E Hong Kong Reef Fish Survey |
| Family: | Apogonidae (Cardinalfishes), subfamily: Apogoninae | |||
| Max. size: | 7.4 cm TL (male/unsexed) | |||
| Environment: | reef-associated; marine; depth range 3 - 91 m | |||
| Distribution: | Indo-West Pacific. | |||
| Diagnosis: | Dorsal spines (total): 7-7; Dorsal soft rays (total): 9-9; Anal spines: 2-2; Anal soft rays: 12-13. This species is distinguished by the following characters: bluish longitudinal stripe on the middle of the body; translucent white or pink, silvery on head and abdomen; caudal peduncle sometimes with a posteriorly placed black spot; characterized further by one or both caudal fin lobes having black tip; greatest depth of body 3.3-3.6 in SL (Ref. 90102). | |||
| Biology: | Inhabits lagoon and coastal reefs, among corals and rocks (Ref. 4329, 127962). Lives sympatrically with A. notatus (Ref. 76833). Forms large schools (Ref. 559). Feeds during the day in currents above reefs as well as at night (Ref. 48635). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 17 August 2023 Ref. (130435) | |||
| Threat to humans: | harmless | |||