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Species: Hypsoblennius gentilis, Bay Blenny

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eye: 1 serrated cirrus
behind eyes - no notch
D: front - white blotch + 2 red spots
flank: row white blotches
pectoral 11-12
LL ends under D spine XI

Hypsoblennius gentilis (Girard, 1854)

Bay blenny, Bay Blenny

Moderately elongate; short robust head, with very steep front profile; head profile behind eyes without notch; a small cirrus above posterior nostril; an unbranched, but serrated cirrus present above eye, very elongate in adult males; 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 XI-XII, 16-18, a slight notch between the spiny and soft parts; anal rays II, 16-19; pectoral 11-12; lateral line ends under 11th dorsal fin spine.

Brown to greenish, white on throat and belly region; upper back with series of dark brown saddle-like marks; a horizontal row of white blotches along side at level of pectoral fin base; dorsal fin with a red blotch at front; adult males with red bar across throat, most evident during the breeding season.

Size: to 15 cm.

Inhabits intertidal shallows.

Depth: 0-25 m.

Monterey, California to the W and central E Gulf of California.

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  • Marine
  • Brackish
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Reef (rock/coral/oyster)
  • Rocks
  • Barnacles & worm tubes
  • Reef only
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Demersal
Feeding Group
  • Corallivore
  • Omnivore
  • No Data
  • Sessile worms
  • Sessile crustacea
  • Mobile benthic crustacea (shrimps/crabs)
  • Benthic microalgae
  • Mobile benthic worms
  • Data
Egg Type
  • Benthic
  • No data
  • Pelagic larva
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • All species
  • Temperate Eastern Pacific, primarily
  • Continent only
  • Continental TEP endemic
  • California province, primarily
  • TEP endemic
  • Continent
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 15
Depth Range Min
  • 0
Depth Range Max
  • 25