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Species: Bathygobius ramosus, Panamic frillfin

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3 dark spots after eye - 1st large
D1 : striped, no clear border
C - dark bars
head with white spots
pectoral: free rays with > 1 branch

Bathygobius ramosus Ginsburg, 1947

Panamic 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, 8-10 rays; anal I, 7-9 rays; pelvic disc  rounded, front membrane with large side lobes; tail round, 24-31 rays; pectoral rays 18-21,  usually the 1st  and invariably the remaining five branching more than once; scales large, rough, 32-38 on mid side, predorsal scales not reaching eyes, rest of head scaleless.

Olive green to brown with lighter scale centres; often a row of dark spots along midside and diffuse bars or saddle may be present on back; lower head with small white ocelli; first dorsal fin entirely pigmented, and with a central stripe; caudal and second dorsal fin with wavy brown bands or spots; 1st  of 3 dark blotches behind eye is largest.

Size: grows to 11.4 cm.

Inhabits the rocky intertidal zone.

Depth: 0-2 m.

Southern Baja and the Gulf of California to northern Peru, Cocos Island, and the Revillagigedos Islands.

Note: According to Miller et al 2001 there are two subspecies - Bathygobius r. longipinnis from the Revillagigedos and Tres Marias, and Bathygobius r. ramosus from the remainder of the range.

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  • Freshwater
  • Marine
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Rocks
  • Reef associated (reef + edges-water column & soft bottom)
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Estuary
  • Mangrove
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • Pelagic larva
  • No data
  • Benthic
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Island (s)
  • Continent
  • TEP endemic
  • Continent + Island (s)
  • All species
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • South Temperate (Peruvian Province )
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 11.4
Depth Range Min
  • 0
Depth Range Max
  • 2