Shorefishes of the Eastern Pacific online information system

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Species: Microdesmus multiradiatus, Giant worm-goby

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eye tiny, high
plain color
C pointed
thick lips, with large folds
chin round
A 53-59
pectoral: 12
scales 37 radiating lines

Microdesmus multiradiatus Meek & Hildebrand, 1928

Giant worm-goby

Slender, wormlike, body height 3-9% of SL; tail (without fin) 59-63% of SL; eyes tiny, high on side of head, skin covered; mouth large, only weakly oblique, snout blunt and square; lower jaw with convex profile, not strongly projecting; lips very large, with fleshy folds, large free lateral flanges at corners of mouth; teeth in 2 irregular rows, lower jaw with a few canines in outer series; gill opening large (not tubular), about as long as base of pectoral; dorsal fin spines evenly spaced, 74-78 elements, origin over tip of pectoral; anal II, 53-59; pectoral 12 rays; pelvics I, 3, shorter than pectorals; tail fin pointed; dorsal and anal fins confluent with tail fin; scales small, non-overlapping, well separated; body and head scaly except snout and lower jaw; scales with 37 radiating ridges.

Olive to brown, tail fin dusky.

Size: 22 cm.

Habitat: rocky shores.

Depth: 0-10 m?

Panama Bay.

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  • Brackish
  • Non Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Estuary
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent
  • Continent only
  • TEP endemic
  • All species
  • Continental TEP endemic
  • Panamic province endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 22
Depth Range Min
  • 0
Depth Range Max
  • 10