Shorefishes of the Eastern Pacific online information system

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Species: Rhencus panamensis, Highfin grunt, Panama grunt

All Families:   All Genera:   All Species:

silver, yellow fins
operculum: dark blotch
pectoral passes pelvic tip
A: 2nd spine slender
Rhencus panamensis (Steindachner, 1876)
Panama grunt,    Highfin grunt

Body an elongate oval, strongly compressed; forehead profile convex; mouth reaching under front of pupil, inside not red, lips thin; chin with 2 pores at front and 2 inside hole behind, plus a longitudinal groove; preopercle finely serrated; dorsal fin XII, 12-13, deeply notched; anal III, 7-8, second anal spine slender, not reaching tips of longest soft rays when depressed; pectorals very long, reaching origin of anal fin; no scales on soft dorsal and anal; 48-52 pored lateral line scales; 7 oblique rows of scales between lateral line and origin of dorsal fin.

Silvery with prominent blackish blotch behind upper edge of gill cover; fins yellowish.

Size: grows to at least 35 cm.

Habitat: on sand and mud bottoms. Generally captured by shrimp trawlers on soft bottoms.

Depth: 5-107 m.

Southern Baja and the Gulf of California to Peru.

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  • Brackish
  • Marine
  • Freshwater
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Near Bottom
  • Bottom + water column
  • Sand & gravel
  • Freshwater
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Mud
  • Water column
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • Data
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Octopus/squid/cuttlefish
Egg Type
  • No data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • TEP endemic
  • Continent
  • Continental TEP endemic
  • All species
  • Continent only
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 35
Depth Range Min
  • 5
Depth Range Max
  • 107