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Species: Omobranchus sewalli, Muzzled Blenny

All Families:   All Genera:   All Species:

slender, elongate
no cirri
head - 3 bars; nape red-brown cross-bar
body: thin stripes at front & rows spots behind



Omobranchus sewalli (Fowler, 1931)

Muzzled Blenny

Very elongate; head slightly rounded snout overhanging, nape slightly swollen; no fleshy crest on top of head; almost always 3 (2-4) pores between eyes; no cirri on nostrils, nape or eyes; upper jaw teeth fixed, fewer than 50; an enlarged canine on each side at rear of lower jaw; a flap of skin at lower rear of bottom jaw; gill opening not extending below top of pectoral base; dorsal fin XII (XII-XIV), 19-24, no notch between spines and rays; anal fin II, 20-26, 1 or both spines imbedded and not visible externally; tail fin with 13 (11-14) segmented rays, none filamentous; all fin rays unbranched; pelvic fin I, 2, longest rays shorter than longest pectoral ray; lateral line a short arch over pectoral, 2-8 double-pored tubes; no scales.

Greenish grey; 3 dark bars on head - under eye to mouth, behind eye, across operculum; a dark redbrown bar across nape, a little before dorsal fin origin; back with 11 dark saddles; flank with faint vertical bars at rear; 4-5 slender dusky stripes on upper side of front half of body.

Reaches 11.3 cm.

Lives in coastal areas around rocks and mangroves; in brackish water.

Depth range: 0-2 m.

Natural range is E Africa to Fiji; introduced to the Atlantic; Panama to Brazil.

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  • Brackish
  • Non Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Rocks
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Barnacles & worm tubes
  • Corals
  • Estuary
  • Mangrove
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Detritivore
  • Herbivore
  • Data
  • Benthic microalgae
  • Detritus
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Exotic (Introduced)
  • Greater Caribbean non-endemic
Regional Endemism
  • Extends South of GC
  • Also in Brazil
  • Continent
  • Continent only
  • Exotic (Introduced)
  • GC non-endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 11.3
Depth Range Min
  • 0
Depth Range Max
  • 2