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Species: Gobulus birdsongi, Fin-joined goby

All Families:   All Genera:   All Species:

red-brown + white stripe - snout to C
2 Ds partly joined, dark bases
D2 I,13; A I, 13

Gobulus birdsongi Hoese & Reader, 2001

Fin-joined goby

Slender, compressed body; distinctly depressed head; head without pores; mouth small, at front, oblique, lower jaw projecting, top jaw not extending beyond eye; teeth in bands on jaws, no canines; longitudinal and vertical rows of papillae on cheeks; dorsal fin VII+ I, 13, 2 fins partly connected at the base; anal fin I, 13; pectoral fin 18 (16-18); partial low membrane between the front of the pelvic spines, fins form a flat plate; tail short, rounded; no scales.

Red-brown head and body; with a cream stripe running from snout through eye to top of tail fin base and extending as a blotch onto upper part of tail fin; head and body darker below than above cream stripe; inner half of dorsal, tail and pectoral fins dark outer halves clear; pelvics and anal clear.

Size: to 7.2 cm

Habitat: In rock crevices.

Depth: 6 m.

El Salvador to Panama.

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  • Freshwater
  • Non Marine
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Mangrove
  • Estuary
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Freshwater
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • TEP endemic
  • Panamic province endemic
  • Continent only
  • All species
  • Continent
  • Continental TEP endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Critically endangered
  • Listed
  • Not listed
Length Max
  • 7.2
Depth Range Min
  • 0
Depth Range Max
  • 6