Scientific Name
Stegastes obreptus

Common Name
Western gregory

Biology
Dorsal spines (total): 13; Dorsal soft rays (total): 14-16; Anal spines: 2; Anal soft rays: 12 - 14. Body and median fins generally brown to nearly black; body paler ventrally; fins grading to smoky gray distally. Margin of scales on sides with blackish streak, appearing as series of transverse bands; few small blue spots scattered on head and sides. Pelvic and anal fins bright blue anteriorly. Morphologically similar with S. fasciolatus but S. obreptus has well-developed serrae on the suborbital and preopercle margins, posterior outline of soft dorsal more pointed and angular, and it differs in habitat. Lips dusky brown.

Classification

Classified By

Whitley, 1948

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Damselfishes (Pomacentridae)

Distribution

Region

Indo-Pacific

Distribution

Indo-Pacific: Ryukyu Islands, encompassing the Indo-Malayan Archipelago, Western Australia north of Abrolhos Islands; reaching eastward along the northern margin of the tropical Indian Ocean to Sri Lanka and India.

Range

30°N - 30°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

2 m

Depth To - meters

10 m

Zone

reef-associated

Environment

Marine; reef-associated; non-migratory; depth range 2 - 10 m (Ref. 9710)

Trophic Level

2 s.e. 0.00 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

False

Physical Size and Genetics

Maximum Length

12.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low to moderate vulnerability (28 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated