Shorefishes of the Eastern Pacific online information system

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Species: Quietula y-cauda, American shadow goby

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head large, depressed; groove across nape
side- row dark spots
C base - Y shaped blotch
top jaw extends onto opercle
male: A - black stripe

Quietula y-cauda (Jenkins & Evermann, 1889)

Shadow Goby, American Shadow Goby

Elongate, slender (depth 14% of TL), little compressed; head large, depressed; a transverse groove across nape; eyes on top of head, close together; mouth large, upper jaw bone very long, reaching onto operculum; teeth in single series, on lower jaw and front of upper, slightly curved; tongue round tip; 11-13 short, blunt gill rakers; dorsal IV-V + I, 13-15; anal I, 12-15, long base; pelvics fused to form disc, relatively short, not reaching nearly to anus; pectorals long, reaching past end of pelvics, 19 rays; scales small, smooth, imbedded, slightly visible only on sides, ~ 50 irregular rows along side.

Color variable: dark to light above, paler below, head and body with dark speckles; a row of dark spots along midflank; lateral Y shape mark just before tail fin; tail fin with 6-7 thin bars; spinous dorsal with dark blotches; male with thick black stripe along middle of anal fin,

Size: 7.0 cm (4.2 cm in the Gulf of California).

Habitat: mud flats of lagoons and river mouths, at times in worm or shrimp burrows.

Depth: 0-6 m.

Southern California to Gulf of California.

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  • Non Marine
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Estuary
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • Benthic
  • No data
  • Pelagic larva
Global Endemism
  • TEP non-endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • All species
  • Continent only
  • California province, primarily
  • Tropical Eastern Pacific (TEP) non-endemic
  • Temperate Eastern Pacific, primarily
  • Continent
  • Resident
Climate Zone
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 7
Depth Range Min
  • 0
Depth Range Max
  • 6