Shorefishes of the Eastern Pacific online information system

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Species: Bathygobius andrei, Estuarine frillfin

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3 dark spots after eye - small, 3rd > 1st
D1 dark oblique bar
head without white spots
pectoral: free rays - 1 branch

Bathygobius andrei (Sauvage, 1880)

Estuarine frillfin

Body robust; head broad, depressed; snout bluntly rounded; eyes large, close together; mouth moderate sized, relatively horizontal; tongue with distinct notch in front; jaw teeth in bands, without canines; dorsal fins VI + I, 9-10 rays; anal I, 8-9 rays; pelvic disc more or less rounded, its front membrane with angular edges; tail round, 23-32 rays; pectoral rays 20-22, the uppermost 6 rays forming free filaments, 1st  to 4th  branch only once; scales large, rough, 33-36 on mid side, predorsal scales not reaching eyes; sometimes a small patch of scales on upper corner of operculum, rest of head scaleless.

Grey brown with light streak on each scale; faint dark bars and blotches evident on side; head without pale spots; 1st  dorsal fin with an oblique dark bar at front; 3 dark blotches behind eye small, 2nd  is smallest and 3rd  is largest; juveniles are much lighter with well defined blackish bars and blotches and a dark-spotted caudal fin.

Size: grows to at about 15 cm.

Inhabits brackish water in tide pools and rocky shores of bays and in creeks and estuaries.

Depth: 0-2 m.

Guatemala to northern Peru.

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  • Brackish
  • Marine
  • Freshwater
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Rocks
  • Mangrove
  • Reef (rock/coral/oyster)
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef associated (reef + edges-water column & soft bottom)
  • Estuary
  • Reef and soft bottom
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • No data
  • Benthic
  • Pelagic larva
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • Panamic province endemic
  • Continental TEP endemic
  • Continent only
  • All species
  • TEP endemic
  • Continent
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 15
Depth Range Min
  • 0
Depth Range Max
  • 2