Island gregory (Stegastes insularis)

Scientific name: Stegastes insularis Allen & Emery, 1985

Island gregory (Stegastes insularis)

The Island gregory (Stegastes insularis) is a marine fish of the family Pomacentridae.

Biology

Dorsal spines (total): 12; Dorsal soft rays (total): 15-17; Anal spines: 2; Anal soft rays: 11 - 13. Scales of head and body finely ctenoid, few cycloid may be present on ventral of head and on snout. Pale blue-gray to charcoal in color with dusky gray scale margins, appearing as series of narrow transverse bands. The posteriormost part of body, caudal peduncle, caudal fin and posterior part of dorsal fin are bright yellow; suborbital bluish and lavender. An elongate black patch with narrow blue margin is between 1st and 4th dorsal spines. The pectoral fins are translucent with a suffusion of yellow. A small black spot is at the base of the uppermost rays of the pectoral fin.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Stegastes insularis
Family
Pomacentridae (Damselfishes)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
11.0
Depth range
1–10 m (3–33 ft)
Environment
Marine; reef-associated; non-migratory; depth range 1 - 10 m, usually 1 - 3 m
Climate
Tropical
Distribution
Eastern Indian Ocean: Christmas Island Northwest Pacific: Marcus Island (Minami Tori Shima). These isolated populations are probably relicts of a once widespread species.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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