Dascyllus trimaculatus (Rüppell, 1829)
Threespot dascyllus
photo by Randall, J.E.

Family:  Pomacentridae (Damselfishes), subfamily: Pomacentrinae
Max. size:  14 cm TL (male/unsexed)
Environment:  reef-associated; depth range 1 - 55 m, non-migratory
Distribution:  Indo-Pacific: Red Sea and East Africa to the Line and Pitcairn islands, north to southern Japan, south to Sydney, Australia. Not found in the Hawaiian and Marquesan islands.
Diagnosis:  Dorsal spines (total): 12-12; Dorsal soft rays (total): 14-16; Anal spines: 2-2; Anal soft rays: 14-15. Juveniles overall black with scale centers bluish; white blotch on forehead and upper sides; all fins black except the transparent pectoral and outer portion of soft dorsal rays. Geographic and behavioral color of adults variable; no spot on forehead; spot on upper sides very reduced; head and fins normally black; scales with black margins. Margins of preorbital, suborbital and preoperculum finely serrated (Ref. 2746). Nuptial fish generally paler color. Body depth 1.4-1.6 in SL (Ref. 90102).
Biology:  Adults inhabit coral and rocky reefs, juveniles often commensal with large sea anemones, sea urchins, or small coral heads (Ref. 4391, 48636). They occur in small to large aggregations. Stomach contents include algae, copepods, and other planktonic crustaceans (Ref. 7247). Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205). Diurnal species (Ref. 54980; 120737).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Capuli, Estelita Emily - 19.02.92
Modified by: Jansalin, Jeremiah Glenn - 24.10.19
Checked by: Reyes, Rodolfo B. - 29.08.94

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