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Species: Hypoplectrus gemma, Blue hamlet

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bright blue
C upper & lower rays black

Hypoplectrus gemma Goode & Bean, 1882

Blue hamlet

Head and body deep, strongly compressed; forehead straight; snout relatively short; top jaw protrusible; rear of top jaw exposed when mouth closed, without accessory bone above it; teeth fixed; preoperculum angular, serrated, several small forward pointing spines on lower edge near the corner; gill rakers 17-23; dorsal fin X, 14-17, no notch after spines, membranes between spines not indented; pelvics long, reach to or beyond anus; tail fin slightly forked; lateral line scales 48-53; soft dorsal and anal fins mostly scaleless.

Head and body bright blue; dorsal and anal fins blue at front; tail fin clear, upper and lower borders black.

Reaches 13 cm.

Lives on reefs.

Depth range: 3-20 m.

The northern Greater Caribbean.


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Salinity
  • Marine Only
  • Marine
Inshore/Offshore
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
Habitat
  • Rocks
  • Reef only
  • Corals
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
Diet
  • Mobile benthic crustacea (shrimps/crabs)
  • Bony fishes
Egg Type
  • Pelagic
  • Pelagic larva
  • Data
Global Endemism
  • West Atlantic Endemic
  • Greater Caribbean endemic
Regional Endemism
  • Continental primarily
  • GC endemic
  • Island (s)
  • Continent
  • Continent + Island (s)
Residency
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
IUCN Red List
  • Not evaluated / Listed
CITES
  • Not listed
Length Max
  • 13
Depth Range Min
  • 3
Depth Range Max
  • 20