Shorefishes of the Eastern Pacific online information system

Español  Contact

Species: Chaetodon auriga, Threadfin butterflyfish

All Families:   All Genera:   All Species:

white front, yellow rear
bar through eye
front body: chevron lines
soft D - long filament

Chaetodon auriga Forsskål, 1775

Threadfin butterflyfish

Body a strongly compressed oval disc; mouth small, at end of a short, pointed snout that is 2x eye diameter; teeth long and slender; dorsal fin with XIII, 22-25, front soft rays elongated into a filament; anal fin III, 19-21, 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); 33-43 lateral line scales.

Head and front ½ of body white; rear half of body, tail and rear parts of dorsal and anal fins yellow; a black bar from nape through eye down to throat; thin dark lines forming chevron pattern on body; a large black spot on upper soft dorsal.

Size: 23 cm.

Habitat: rocky and coral reefs.

Depth: 1-66 m.

An Indo-Pacific species; as a vagrant in the Galapagos.


High Resolution Map Download

Species Data Create Report Export as Word File Export as Excel File
  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom + water column
  • Near Bottom
  • Rocks
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
  • Corals
  • Water column
  • Submerged vegetation
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Omnivore
  • Sessile worms
  • Sessile molluscs
  • Data
  • Soft corals/hydroids
  • Hard corals
  • Benthic microalgae
  • Sponges/seasquirts/bryozoa
Egg Type
  • No data
  • Pelagic larva
  • Pelagic
Global Endemism
  • TEP non-endemic
  • Indo-Pacific only (Indian + Pacific Oceans)
  • All Pacific (West + Central + East)
  • "Transpacific" (East + Central &/or West Pacific)
  • All species
Regional Endemism
  • All species
  • Tropical Eastern Pacific (TEP) non-endemic
  • Eastern Pacific non-endemic
  • Island (s)
  • Island (s) only
  • Vagrant
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 23
Depth Range Min
  • 1
Depth Range Max
  • 66