Whitetail dascyllus (Dascyllus aruanus), is a species of marine fish in the family Pomacentridae.
Distinctive Characters - Dorsal fin with 12 spines and 11-13 rays. Anal fin with 2 spines and 11-13 rays. Pectoral rays 17-19. Body depth 1.5-1.7 in standard length. Suborbital bones scaled and finely serrate. Preopercular margin finely serrate. Pectoral fin slightly shorter than head.
Colour - White with three broad black bars. The first diagonal bar from nape and upper head through eye to chin. Caudal fin pale.
Max length : 10.0 cm TL male/unsexed.
Common length : 6.0 cm TL male/unsexed.
Max. reported age: 6 years.
Whitetail dascyllus's Behavior & Ecology
Whitetail dascyllus is widespread throughout the tropical waters of the Indo-Pacific region, Red Sea included and Indian Ocean.
Territorial, inhabit shallow lagoon and subtidal reef flats. Form large aggregations above staghorn Acropora thickets or in smaller groups above isolated coral heads.
Whitetail dascyllus's Feeding
Feed on zooplankton, benthic invertebrates, and algae.
Whitetail dascyllus's Reproduction
Male selects and protects the nest; does the courtship `dance' about 1 m above the nest and escorts the attracted female to the nest site where spawning ensues. Oviparous, distinct pairing during breeding. Eggs are demersal and adhere to the substrate.