Species: Hypsoblennius exstochilus, Longhorn Blenny
green; head and front body - white mottling

Hypsoblennius exstochilus Bohlke, 1959
Longhorn Blenny
Moderately elongate; short robust head, with very steep front profile; a very long cirrus with a thick central stalk covered with rear-pointing branches over eye, no cirri at nostrils or on nape; an elongate fleshy flap at rear end of lower lip; teeth with blunt flattened tips, in single rows, not movable, no canines on either jaw; gill openings restricted to sides of body by fusion of gill cover membranes to throat; dorsal fin XI-XIII (spines slender and flexible), 13-16, with a slight notch between the spiny and soft parts; pelvic fins I, 3; fin rays unbranched, except on tail fin; lateral line ends under end of spiny dorsal fin; no scales.
Yellowish; a dark brown bar down through eye to lower body and up along main shaft of eye cirrus; front and sides of head heavily mottled with white; white mottling along upper back and front ~6 spines of dorsal fin, a dark spot centered on 2nd dorsal spine.
Reaches 6.3 cm.
Lives in rocky areas exposed to surge and eroded bottoms with sea fans.
Depth range: 0-7 m.
The Bahamas to the S Caribbean.

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- Salinity
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- Marine
- Marine Only
- Inshore/Offshore
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- Inshore
- Inshore Only
- Water Column Position
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- Bottom
- Habitat
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- Reef only
- Rocks
- Reef (rock/coral/oyster)
- Reef associated (reef + edges-water column & soft bottom)
- FishBase Habitat
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- Reef Associated
- Feeding Group
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- Corallivore
- Data
- Omnivore
- Diet
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- Data
- Soft corals/hydroids
- Benthic microalgae
- Mobile benthic crustacea (shrimps/crabs)
- Mobile benthic worms
- Egg Type
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- Benthic
- Data
- Pelagic larva
- Global Endemism
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- All species
- Greater Caribbean endemic
- West Atlantic Endemic
- Regional Endemism
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- GC endemic
- Island (s)
- Island (s) only
- All species
- Residency
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- Resident
- Climate Zone
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- Subtropical (23-35N, Florida / Carolinas / Bermuda)
- Tropical (10-23N, Nicaragua / Cuba)
- IUCN Red List
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- Least concern
- Listed
- CITES
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- Not listed
- Length Max
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- 6.3
- Depth Range Min
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- 0
- Depth Range Max
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- 7