Stegastes arcifrons (Heller & Snodgrass, 1903)
Island major
Stegastes arcifrons
photo by Wirtz, P.

Family:  Pomacentridae (Damselfishes), subfamily: Microspathodontinae
Max. size:  13 cm SL (male/unsexed); max. reported age: 27 years
Environment:  reef-associated; marine; depth range 1 - 20 m, non-migratory
Distribution:  Eastern Pacific: Costa Rica and from Cocos, Malpelo and Galapagos islands (Ref. 9334).
Diagnosis:  Dorsal spines (total): 12-12; Dorsal soft rays (total): 15-16; Anal spines: 2-2; Anal soft rays: 12-13. Exhibits geographic color variations.
Biology:  Adults inhabit coral and rocky reefs (Ref. 9334). Omnivorous (Ref. 9334). Adults are territorial and aggressive, vigorously driving off other fishes and certain invertebrates from their feeding and reproductive territories. They graze on algae and invertebrates including tubeworms, small crustaceans, and the tentacles of anemones (Ref. 28023). 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).
IUCN Red List Status: Least Concern (LC); Date assessed: 27 May 2007 Ref. (130435)
Threat to humans:  harmless


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