Verulux cypselurus (Weber, 1909)
Swallowtail cardinalfish
Verulux cypselurus
photo by Randall, J.E.

Family:  Apogonidae (Cardinalfishes), subfamily: Apogoninae
Max. size:  6 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 2 - 15 m
Distribution:  Indo West Pacific:
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 9-9; Anal spines: 2-2; Anal soft rays: 9-10. This species is characterized by the following: D VI-I; 9, A II, 9; an intermittent black stripe from the snout to the middle of the opercle; no black blotch on the caudal-fin base (Ref. 109581); semi-transparent body with yellowish sheen on head and belly; side of snout with black spot or short stripe; each caudal fin lobe with blackish submarginal band; greatest depth of body 3.8-4.3 in SL (Ref. 90102).
Biology:  Forms large shoals among rocks or above corals of lagoon patch reefs (Ref. 1602). Often schools with R. gracilis (Ref. 37816). Spreads out at night, floating mid-water to catch plankton (Ref. 48635).
IUCN Red List Status: Least Concern (LC); Date assessed: 05 February 2021 Ref. (130435)
Threat to humans:  harmless
Country info:  Collected from North Male Atoll and Ari Atoll, (Ref. 109581). Museum: MRS 36/86 (4.7 cm SL). BPBM 33055 (10:3.6-4 cm SL).


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