Shorefishes of the Eastern Pacific online information system

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Species: Hypsoblennius caulopus, Tidepool blenny

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nape: warts, side groove to eye
eye: tuft small cirri
lower head: dark & light bars
body: wavy dark bars
D: shallow notch
no canines

Hypsoblennius caulopus (Gilbert, 1898)

Tidepool blenny

Moderately elongate; short robust head, with very steep front profile; nape with fleshy warts and a lateral groove behind the eye; front nostril and upper margin of the eye each with a tuft of small cirri; no cirri on nape; teeth with blunt flattened tips, in single rows, not movable, no rear canines on either jaw; gill openings restricted to sides of body by fusion of gill cover membranes to throat; dorsal fin XII, 15-16, a slight notch between the spiny and soft parts; anal rays II, 17.

Grey brown, with wavy, irregular dark brown and light tan bars on side, extending on to dorsal fin; head largely dark brown with light and dark bars on lips, chin and throat.

Size: attains 9 cm.

Inhabits rocky reefs covered with algae, shallow waters, including tide pools.

Depth: 1-5 m.

Nicaragua to Peru, Malpelo.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Barnacles & worm tubes
  • Reef associated (reef + edges-water column & soft bottom)
  • Rocks
  • Reef (rock/coral/oyster)
  • Reef only
FishBase Habitat
  • Reef Associated
Feeding Group
  • No Data
  • Omnivore
  • Benthic microalgae
  • Mobile benthic worms
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • TEP endemic
  • All species
  • Island (s)
  • Continent
  • Continent + Island (s)
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 9
Depth Range Min
  • 1
Depth Range Max
  • 5