Shorefishes of the Eastern Pacific online information system

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Species: Akko brevis, Dark-tail specter-goby

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only D & C black
D & A - 14



Akko brevis (Günther, 1864)

Dark-tail Specter-goby

Body elongate; eyes very small; head without pores; vertical and horizontal rows of small papilla on head and operculum; mouth large, almost vertical; teeth elongate, large, depressible, lower teeth overlapping the upper jaw when closed; upper jaw slightly extendible, ends before level of center of eye; upper jaw with one row of depressible, long, well separated canines, lower with two rows, the outer row enlarged; gill opening from a little below top of pectoral base to a little above pelvic base, lower rear edge curved back; gill arches with simple to complex papillae rather than rakers; gill membranes broadly joined to body under throat, with 5 rays; dorsal, anal and tail fins with serially branched rays; 1st dorsal VII, 14, dorsal fins connected along lower half of 1st ray of second fin; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 14; dorsal and anal fins joined to tail fin; pectoral fins short; pelvics fused in a deeply cupped, circular disc on a stalk, fin rays multiply branched; scales small, rounded, smooth, imbedded, not overlapping; head and pectoral base scaleless; no lateral line.

Body translucent white, speckled with black along back, pink around gill area; dorsal fin and tail fin black.

Size: 8 cm.

Habitat: mud bottoms, estuaries.

Depth: 5-40 m.

El Salvador to Panama.

This species, which was originally described as a species of Amblyopus was included in Gobioides by Hoese 1995.

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  • Marine
  • Brackish
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Estuary
  • Mud
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Planktivore
  • No Data
  • Carnivore
  • Zooplankton
  • Pelagic fish eggs
  • No Data
Egg Type
  • No data
  • Pelagic larva
  • Benthic
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Panamic province endemic
  • All species
  • Continent only
  • Continent
  • TEP endemic
  • Continental TEP endemic
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 8
Depth Range Min
  • 5
Depth Range Max
  • 40