Hypoplectrus gemma

Common Name

Blue Hamlet

Year Described

Goode & Bean, 1882

Identification

Dorsal Fin: X, 14-16
Anal Fin: III, 7
Pectoral Fin: 13-14
Pelvic Fin: I, 5
Lateral Line: 48-53
Gill Rakers: 6-7 (upper), 12-13 (lower) on first arch

Body robust and laterally compressed. Steeply sloping head profile. Dorsal fin continuous with no obvious notch between spiny and soft portions. Anal fin much smaller than dorsal fin. Caudal fin is typically truncate to slightly emarginate. The mouth is large and terminal, with the lower jaw often slightly projecting. Jaws bear villiform teeth, with an inner band of enlarged canines. Scales are ctenoid and cover the body and much of the head. The lateral line is continuous and curves gently along the upper body.

Color

Body and fins brilliant cobalt blue. The upper and lower margins of the tail are black.

Size

Maximum size to 13cm SL.

Habitat

Coral reefs from 3-20m.

Range

Northern Caribbean islands and the S. Gulf of Mexico.

References

McEachran, J.D. and J.D. Fechhelm. 2005. Fishes of the Gulf of Mexico. Volume 2: Scorpaeniformes to Tetraodontiformes. University of Texas Press, Austin. i-viii +1-1004.