Shorefishes of the Eastern Pacific online information system

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Species: Tomicodon bidens, Bifid clingfish

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front nostril: large flap
D 7-8
pectoral 21
pale + fine dark meshwork
no blotch above pectoral
anus ~ midway A to sucker

Tomicodon bidens Briggs, 1969

Bifid clingfish

Body relatively slender, elongate, head relatively slender (both viewed from above); a large flap from front nostril; upper jaw with 3 pairs of bifid incisors followed on each side by one large canine; lower jaw with pair of simple incisors at front followed by 2 bifid incisors on each side, then a large canine; anus about halfway between anal fin origin and rear margin of disc; pectoral 21 rays; only a small fleshy swelling at pectoral base;sucker disc with broad patch of papillae at front, no papillae in center,6-7 rows of papillae across rear section; dorsal 8 (7-8) rays; anal 7 (6-7) rays; tail 8 (7-8) rays.
Olive with reticulum of small brown-edged whitish spots; sometimes a series of dark bars evident across dorsal surface; no dark blotch above pectoral base.
Size: reaches 2.8 cm.
Inhabits rocky shores.
Depth: 0-10 m?

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
  • Rocks
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
  • Benthic microalgae
  • Mobile benthic worms
  • Data
  • Zooplankton
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • Continental TEP endemic
  • TEP endemic
  • Continent only
  • All species
  • Panamic province endemic
  • Continent
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Vulnerable
  • Not listed
Length Max
  • 2.8
Depth Range Min
  • 0
Depth Range Max
  • 10