Shorefishes of the Greater Caribbean online information system

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Species: Pseudomyrophis frio, Coldwater worm eel, Slender worm eel

All Families:   All Genera:   All Species:

head 6.9-7.8% TL
body depth 1.5-2.2% TL
D origin ~mid-trunk
pectoral tiny

Pseudomyrophis frio (Jordan & Davis, 1891)

Slender worm eel

Worm-like; moderately elongate (body depth 1.5-2.2% of TL), compressed; head and trunk 35-39% of TL; head 6.9-7.8% of TL; eye over rear 1/3 of mouth; snout blunt, swollen, rough, overhanging, without groove on underside; front nostril tubular, flared at edge, with a short side barbel, rear one an irregular elongate slit before lower edge of eye; lips without barbels, teeth small, conical, sharp, 2-3 pairs of teeth at front top, those continuous with a 2-3 row patch followed by a single row on front of roof of mouth; 1 row of teeth on jaws, slender, directed back, 9-18 teeth on top jaw, 23 on lower; gill opening small, on underside; dorsal fin origin about mid-trunk; pectoral fin tiny (< eye), at top of gill opening; dorsal and anal fins confluent with tail fin; tail flexible, tail fin not obvious; lateral line complete, lines of each side of head connected by 2 canals with across top of head.

Preserved fish uniform brown, with small speckles and spots.

Reaches 30.8 cm.

Lives on soft bottoms.

Depth range: 100-494 m.

Bahamas to Brazil.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Mud
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Bony fishes
Egg Type
  • Data
  • Pelagic larva
  • Pelagic
Global Endemism
  • All species.
  • Transatlantic (East+West Atlantic)
  • Greater Caribbean non-endemic
Regional Endemism
  • Also in Brazil
  • All species..
  • Extends South of GC
  • Continent only
  • GC non-endemic
  • Continent
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 30.8
Depth Range Min
  • 100
Depth Range Max
  • 494