Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Pomacentridae
(Damselfishes) > Pomacentrinae
Etymology: Dascyllus: Greek, daskillys, -on = a kind of fish (Ref. 45335).
Environment / Climate / Range
Marine; reef-associated; non-migratory; depth range 0 - 20 m (Ref. 9710). Tropical; 38°N - 35°S, 19°E - 124°W
Length at first maturity / Size / Weight / Age
Maturity: Lm 5.0  range ? - ? cm
Max length : 10.0 cm TL male/unsexed; (Ref. 4391); common length : 6.0 cm TL male/unsexed; (Ref. 5450); max. reported age: 6 years (Ref. 72479)
soft rays: 11 - 13. Color in life white with 3 black bars; a large brown spot on dorsal part of snout and interorbital; lips dusky or white; caudal fin pale; pelvic fins black; pectorals transparent. Margins of preorbital, suborbital, and preoperculum finely serrated (Ref. 2746). Body depth 1.5-1.7 in SL (Ref. 90102).
Indo-West Pacific: Red Sea and East Africa to the Line, Marquesan and Tuamoto islands, north to southern Japan, south to Sydney, Australia.
Territorial, inhabit shallow lagoon and subtidal reef flats. Form large aggregations above staghorn Acropora thickets or in smaller groups above isolated coral heads. Feed on zooplankton, benthic invertebrates, and algae. Males invite females to spawn in their nests; protecting the eggs until they hatch and becoming very aggressive against other fish. Eggs hatch after 3-5 days; pelagic larvae feed on plankton (Ref. 5503). Oviparous, distinct pairing during breeding (Ref. 205). Used in behavioral study. Have been reared in captivity (Ref. 35412).
Randall, H.A. and G.R. Allen, 1977. A revision of the damselfish genus Dascyllus (Pomacentridae) with description of a new species. Rec. Aust. Mus. 31(9):349-385.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: of no interest; aquarium: commercial
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02690 (0.02263 - 0.03198), b=2.98 (2.93 - 3.03), based on LWR estimates for this species (Ref. 93245
Trophic Level (Ref. 69278
): 2.5 ±0.2 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (tmax=6; Fec=1,500-2,000).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (26 of 100) .