Shorefishes of the Eastern Pacific online information system

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Species: Colpichthys hubbsi, Delta silverside

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head depressed, wide, flat
eye < 20% head
D1 origin over/behind A origin
3-5 scales between D1 & D2
40-47 lateral scales
mouth a little under snout
edge of top lip folded down

Colpichthys hubbsi Crabtree, 1989

Delta silverside

Body deep and strongly compressed; head depressed, and broadly flattened above; top profile ~ straight; eye small (< 20%head length); mouth partly below snout, top jaw extendible; edge of top lip folded down; jaw teeth with double, asymmetrical points; hair-like teeth inside throat; lower gill rakers 15-19, short, compressed, with inner edge serrated; 1st  dorsal with ~ VI spines, origin over or behind origin of anal fin; pectoral fins long (1.5x head length; 3 rows of scales below eye; 4 rows of scales on cheeks; 40-47 lateral scales; 3-5 scales between dorsal fins.

Color: Translucent green, flank with a silver stripe.

Reaches 17.7 cm.

Primarily in freshwater and estuaries.

Depth range 0-4 m.

Endemic to the northern Gulf of California.

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  • Brackish
  • Marine
  • Freshwater
  • Inshore
  • Inshore Only
Water Column Position
  • Near Surface
  • Water column only
  • Surface
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Water column
  • Estuary
  • Freshwater
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • Carnivore
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Data
Egg Type
  • Benthic
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • All species
  • Continent only
  • Northern Gulf of California endemic
  • Continental TEP endemic
  • Cortez province endemic
  • TEP endemic
  • Continent
  • Temperate Eastern Pacific, primarily
  • Resident
Climate Zone
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Listed
  • Endangered
  • Not listed
Length Max
  • 17.7
Depth Range Min
  • 0
Depth Range Max
  • 4