Shorefishes of the Eastern Pacific online information system

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Species: Kyphosus sectatrix, Revillagigedos sea-chub

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snout profile like beak, no forehead bump
lower head profile convex
D 12; A 11
soft D&A medium height, A front profile angular
grey +/- faint yellow stripes
can be yellow, white
fins not dark
LL 63-81 (50-62 pores)
Kyphosus sectatrix (Linnaeus, 1758)
Revillagigedos sea-chub
Body oval, compressed; small pointed head; snout relatively short, profile pointed or beaked, no distinct hump on forehead; bottom profile of head slightly convex; mouth small, horizontal and opens at the front; the top jawbone slips partially under the under-eye bone when the mouth is closed; teeth immovable incisiform, bases set horizontally in mouth, rounded tips and a curved, hockey-stick shape; teeth on center of roof of mouth and on tongue; gill rakers 26 (23-38; 6-9+15-20); dorsal fin continuous, XI spines that fold down into a scaly groove, 12 (11-12) rays; tail fin forked; anal rays III, 11 (10-12); soft dorsal and anal fins moderately high, 4th dorsal ray 4.8-10% SL, 2nd anal ray 8.5-15.2% SL, front profile of anal fin angular; pectoral fin 13.3-24.1% SL; pelvic fins relatively short (11.8-19% SL),  origin of the pelvics behind the base of the pectoral fin; scales small, thick and rough, covering the body & head (except forward of eyes) and soft portions of the median fins; scales present between eyes; lateral line scales 63-81, 56 (50-62) with pores, longitudinal scales 62 (54-69) (the row from edge of operculum to end of tail base, immediately under the lateral line scale row).
Usually grey to silvery, back with bronze and green tones; sometimes faint golden stripes along  side of body and on face, under and over eye; fins not dark; often a whitish stripe under eye; fins not dark; occasionally fish, particularly at oceanic islands, can be white, or yellow, with or white irregular black blotches. This is the only species of Kyphosus with such a pale color form.  Young grey, sometimes with numerous eye-sized white spots.
Size: attains 76 cm.
Habitat: rocky areas, coral reefs.
Depth: 0-93 m.
Pan-tropical; the Revillagigedo Islands; Clipperton and the tip of Baja Peninsula; the Galapagos.
Note: K lutescens is a synonym. Known elsewhere as the Beaked seachub, Pacific seachub, or Bermuda seachub.

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  • Marine Only
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Surface
  • Mid Water
  • Near Surface
  • Bottom + water column
  • Near Bottom
  • Flotsam
  • Water column
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
  • Rocks
FishBase Habitat
  • Reef Associated
Feeding Group
  • Herbivore
  • No Data
  • Benthic microalgae
  • No Data
  • Benthic macroalgae/seagrasses
Egg Type
  • No data
  • Pelagic
  • Pelagic larva
Global Endemism
  • "Transpacific" (East + Central &/or West Pacific)
  • TEP non-endemic
  • All species
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
Regional Endemism
  • Continent + Island (s)
  • Tropical Eastern Pacific (TEP) non-endemic
  • Continent
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 76
Depth Range Min
  • 0
Depth Range Max
  • 93