Shorefishes of the Eastern Pacific online information system

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Species: Achirus mazatlanus, Hairy sole, Mazatlan sole, Pacific lined sole

All Families:   All Genera:   All Species:

grey, ~ 8 cross-lines
eye-side - scattered clumps black hairs
D 55-57; LL < 77
hole connects gill chambers

Achirus mazatlanus (Steindachner, 1869)

Pacific lined sole, Mazatlan sole, Hairy sole

Body oval; eyes on right side; snout rounded; mouth small, arched, a little below snout; lower lip on eyed side fringed; front margin of head with short tentacles; rear edge of preopercle covered with skin, visible as a superficial groove; gill openings wide, united before pelvic fins; an opening connects gill chambers on both sides; dorsal origin ~ above eye; dorsal rays 55-57; anal rays 41-44; pectoral rays 1-4; pelvic on eye side fused to anal; pectorals present or absent; lateral line from head to tail, straight, with perpendicular branches running across body; body covered with rough scales; scales on eyed side with black hair-like filaments; lateral line with < 77 scales.

Dark grey or brownish grey to light tan; ~ 8 vertical dark lines across eyed side and scattered clumps of black hair-like filaments.

Size: to 23 cm.

Inhabits soft mud or sand bottoms of bays and estuaries, also enters freshwater streams.

Depth: 1-55 m.

Northern Baja to the Gulf of California to Peru.


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  • Freshwater
  • Non Marine
  • Brackish
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Sand & gravel
  • Freshwater
  • Estuary
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Beach
  • Soft bottom only
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Data
  • Carnivore
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • Data
Egg Type
  • No data
  • Pelagic larva
  • Pelagic
Global Endemism
  • East Pacific endemic
  • All species
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Continent
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • TEP endemic
  • Continental TEP endemic
  • Continent only
  • All species
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 23
Depth Range Min
  • 1
Depth Range Max
  • 55