Shorefishes of the Eastern Pacific online information system

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Species: Diapterus brevirostris, Peruvian mojarra, Short-snout mojarra

All Families:   All Genera:   All Species:

body deep
forehead steep
D: shallow notch
bone under eye smooth
preopercle serrated
pelvics & A - yellow
A: 2nd spine very long, thick

Diapterus brevirostris Sauvage, 1879

Peruvian mojarra, Short-snout mojarra

Body rhomboidal (depth ~ 50% of SL), compressed;   the lower profile of the head distinctively concave; the mouth highly extensible, pointing downward when protruded; lower border of preopercle finely serrated; bone under front of eye with smooth border; teeth inside throat all pointed; dorsal rays IX, 10, elevated at front,  slight notch between spiny and soft dorsal, 2nd  spine longer than distance between tip of snout and rear of eye; anal rays III, 8, second spine very long and thick; dorsal and anal fin lobes long; pectoral fins relatively long, reaching slightly beyond anal fin origin; tail fin deeply forked, with long pointed lobes; lateral line along longitudinal axis of tail base; scales on front of body not larger than those at rear, conspicuous and finely rough, covering most of head and body; dorsal and anal fins fold into a high scaly sheath along their bases; lateral-line scales 37-40.

Overall silvery, pelvic and anal fins yellowish.

Size: to 38 cm.

Inhabits sandy bays and estuaries, including brackish lower parts of streams.

Depth: 0-30 m?

Southern Baja and the lower 2/3 of the Gulf of California to Peru, and the Galapagos and Revillagigedos.

Note: Formerly Diapterus peruvianus.

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  • Marine
  • Brackish
  • Freshwater
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Estuary
  • Freshwater
  • Soft bottom only
  • Mud
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Mobile benthic worms
  • Mobile benthic gastropods/bivalves
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Pelagic
  • Pelagic larva
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
  • All species
Regional Endemism
  • Island (s)
  • All species
  • Continent + Island (s)
  • TEP endemic
  • Continent
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 38
Depth Range Min
  • 0
Depth Range Max
  • 30