Species: Pomadasys bayanus, Freshwater grunt, Purple-mouth grunt


Pomadasys bayanus Jordan & Evermann, 1898
Purple-mouth grunt, Freshwater grunt
Elongate, strongly compressed; mouth long, reaches under center of eye, inside not red, lips thin; chin with 2 pores at front and 2 inside hole behind, plus a longitudinal groove; preopercle weakly or not serrated, ventral serrations not forward pointing; dorsal fin XII-XIII, 12, moderately notched; anal III, 7, second anal spine very long and stout, its length about two times eye diameter or more; pectoral fins relatively short, not reaching tips of depressed pelvic fins; pelvics short, not reaching anus (except in small juveniles); no scales on soft dorsal and anal fins; 50-51 pored lateral line scales; 8 oblique rows of scales between lateral line and origin of dorsal fin.
Silvery, with an orange tint on sides; fins orangish; juvenile with wavy stripes.
Size: grows to 36 cm.
Habitat: tolerates salinities between 20-30 ppt, but travels considerable distances up fast moving rivers.
Depth: 0-10 m.
Southern Baja to Peru.

High Resolution Map Download
- Salinity
-
- Brackish
- Non Marine
- Freshwater
- Inshore/Offshore
-
- Inshore
- Inshore Only
- Water Column Position
-
- Near Bottom
- Bottom
- Bottom + water column
- Habitat
-
- Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
- Water column
- Sand & gravel
- Freshwater
- Estuary
- Soft bottom only
- FishBase Habitat
-
- Bentho-Pelagic
- Feeding Group
-
- Carnivore
- No Data
- Diet
-
- Data
- Octopus/squid/cuttlefish
- Mobile benthic crustacea (shrimps/crabs)
- Mobile benthic gastropods/bivalves
- Mobile benthic worms
- Egg Type
-
- Pelagic
- Pelagic larva
- No data
- Global Endemism
-
- East Pacific endemic
- All species
- Tropical Eastern Pacific (TEP) endemic
- Regional Endemism
-
- All species
- Continent only
- TEP endemic
- Continental TEP endemic
- Continent
- 3 provinces (Cortez + Mexican + Panamic) endemic
- Residency
-
- 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
- CITES
-
- Not listed
- Length Max
-
- 36
- Depth Range Min
-
- 0
- Depth Range Max
-
- 10