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Species: Axoclinus cocoensis, Cocos triplefin

All Families:   All Genera:   All Species:

male - red head
body & tail base: 4 dark bars (female + orange spots)
C: male -black + pale bar, female - clear

Axoclinus cocoensis Bussing, 1991

Cocos triplefin

Body short, robust; head large; cirri on head small, simple, 1 pair over nostrils, 1 pair over eyes; no teeth on sides of roof of mouth; three dorsal fins (III + XIII + 9); dorsal fin soft rays unbranched; anal fin II, 18; pelvic fins completely separate; lateral line gradually descending from upper edge of gill cover to midlateral axis, with 21-26 tubed scales followed by 8-12 notched scales; scales above lateral line about twice as wide as long; scales small, none on head, breast, belly, and base of pectoral fins; total scales in longitudinal series 33-35.

Female: greyish, with orange lines on head and 3 irregular orange bars on body; Male: head reddish, side with 3 broad dark brown bars with narrow whitish spaces between them; a black band around base of tail; caudal fin frequently black with pale base.

Size: reaches about 3.5 cm.

Inhabits shallow rocky areas.

Depth: 1-35 m.

Isla del Coco.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
  • Reef associated (reef + edges-water column & soft bottom)
  • Corals
  • Reef (rock/coral/oyster)
  • Reef only
  • Rocks
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • East Pacific endemic
  • All species
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • All species
  • Cocos Island endemic
  • Island (s) only
  • TEP endemic
  • TEP oceanic island (s) endemic
  • Island (s)
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Vulnerable
  • Listed
  • Not listed
Depth Range Max
  • 35
Depth Range Min
  • 1
Length Max
  • 3.5