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Species: Chaetodon humeralis, Threebanded butterflyfish

All Families:   All Genera:   All Species:

silver + 3 bars
D & A rear edges black
C: 2 bars

Chaetodon humeralis Günther, 1860

Threebanded butterflyfish

Body a strongly compressed oval disc; mouth small, at end of a short, pointed snout; teeth long and slender; dorsal fin with XIII, 18-20, membranes between spines not strongly indented, dorsal spines increasing in length to fourth or fifth spine then decreasing in length; anal fin III, 15-17, 2nd  spine longer than 3rd; rear edges of dorsal and anal fins bluntly angular; tail edge straight to rounded; scales rough, covering dorsal and anal fins as well as head and body; lateral line in a high arch, incomplete (ends under dorsal fin);  34-39 lateral line scales.

White or silvery white with prominent black bars at level of pectoral fin and just in front of caudal fin base, also a black band from throat, through eye to nape; dorsal, anal, and caudal fin with black bands.

Size: attains 26.4 cm.

Habitat: a common species on rocky reefs

In 3-55 m depths, most common in 5-12 m.

Baja and the central Gulf of California to Chile, including Cocos, Malpelo and the Galapagos.

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Species Data Create Report Export as Word File Export as Excel File
  • Marine
  • Brackish
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Estuary
  • Reef (rock/coral/oyster)
  • Mangrove
  • Rocks
  • Reef and soft bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Corals
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Omnivore
  • Data
  • Benthic microalgae
  • Sponges/seasquirts/bryozoa
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Soft corals/hydroids
  • Hard corals
Egg Type
  • Pelagic larva
  • No data
  • Pelagic
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • Continent
  • Island (s)
  • Continent + Island (s)
  • TEP endemic
  • All species
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 26.4
Depth Range Min
  • 3
Depth Range Max
  • 55