Longfin damselfish (Stegastes diencaeus)

Scientific name: Stegastes diencaeus Jordan & Rutter, 1897

Longfin damselfish (Stegastes diencaeus)

The Longfin damselfish (Stegastes diencaeus) is a marine fish of the family Pomacentridae. Native range: Western Atlantic, southern Florida (USA), Bahamas, and Caribbean Sea. Including Antilles and Yucatan to Venezuela.

Biology

Dorsal spines (total): 12; Dorsal soft rays (total): 15-16; Anal spines: 2; Anal soft rays: 13. Anal fin long and pointed, reaching well beyond base of tail. Adults dark gray-brown, the edges of the scales blackish; a wash of yellowish often present dorsally on head, nape, and on back below spinous portion of dorsal fin; a small black spot at upper base of pectoral fins; juveniles bright yellow with two bright blue lines dorsally on head, extending to beneath middle of dorsal fin where they break into spots; a large blue-edged black spot basally on dorsal fin centered on last spine.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Stegastes diencaeus
Family
Pomacentridae (Damselfishes)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
12.5
Depth range
2–45 m (7–148 ft)
Environment
Marine; reef-associated; non-migratory; depth range 2 - 45 m, usually 2 - 5 m
Climate
Tropical
Distribution
Western Atlantic: southern Florida (USA), Bahamas, and Caribbean Sea. Including Antilles and Yucatan to Venezuela.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Uses
Aquarium: commercial
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

More clownfish & damselfish

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Sources

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

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