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Species: Gymneleotris seminuda, Split-banded goby

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dark + thin white bars on body & head
fins dark + white rays



Gymneleotris seminuda (Günther, 1864)

Split-banded goby

Head broad; head pores with fleshy flaps at margins, no pores on preopercle; head without barbels; tongue tip blunt or slightly concave; rear nostril longer than front one; dorsal fin VII + I, 10 (rarely 9); anal rays I, 9 (rarely 8); pectoral rays 18-19 (rarely 20); pelvic fins completely separate; tail large, rounded; all scales smooth, extend forward on body to level of 3rd  dorsal fin spine, becoming reduced and embedded anteriorly.

Dark brown with striking pattern of thin white bands, oblique on front and side of head, vertical on rear of head and on body; median fins with dark membranes and white rays; base of tail fin with a white bar.

Maximum size, 5.1 cm.

Inhabits algal covered rocky or rubble reefs.

Depth: 1-25 m.

Southern Baja California, and the central Gulf of California to northern Peru.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Submerged vegetation
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
  • Rocks
  • Reef only
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic worms
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Benthic
  • No data
  • Pelagic larva
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Continent
  • TEP endemic
  • Continental TEP endemic
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Continent only
  • All species
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 5.1
Depth Range Min
  • 1
Depth Range Max
  • 25