Scientific Name
Dascyllus trimaculatus

Common Name
Threespot dascyllus

Biology
Dorsal spines (total): 12; Dorsal soft rays (total): 14-16; Anal spines: 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.

Classification

Classified By

R?ppell, 1829

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Damselfishes (Pomacentridae)

Distribution

Region

Indo-Pacific

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.

Range

30°N - 30°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

1 m

Depth To - meters

55 m

Zone

reef-associated

Environment

Marine; reef-associated; non-migratory; depth range 1 - 55 m (Ref. 7247)

Trophic Level

2.8 s.e. 0.10 Based on food items.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

11.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5010 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: minor commercial; aquarium: commercial

Vulnerability

Low to moderate vulnerability (26 of 100)

Resilience

High, minimum population doubling time less than 15 months (Fec=20,000-25,000)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated