Whitemouth Croaker

Habitat Distribution

• Native to the western South Atlantic; in Argentina it concentrates along the Buenos Aires coast and throughout the Río de la Plata estuary.
• Juveniles use estuarine shallows and mudflats as nursery and feeding grounds; adults move into deeper coastal zones but stay demersal — close to the bottom over sand or mud.
• The species ranges south to roughly 40°S along the Argentine coast, though it becomes less abundant south of the Río de la Plata system.
• Tolerates the wide salinity swings of the Río de la Plata, from nearly fresh inner estuary water to full marine conditions offshore.

Key Locations

• Río de la Plata estuary — the core of Argentina's corvina fishery, fished artisanally and recreationally along both the Buenos Aires and Entre Ríos shores.
• Bahía Samborombón — a historically important concentration area, especially during winter when fish gather in numbers.
• Buenos Aires coastal beaches — accessible shore fishing for corvina within reach of the capital, particularly at night on incoming tides.

Specific Spots

• Tidal channels and current edges in the Río de la Plata — corvina stack where moving water concentrates crustaceans and small baitfish over soft bottom.
• Shallow mudflats and sandy beaches along the Buenos Aires coast at night or on overcast days, when fish move inshore to feed.
• Pier pilings and rocky groins create current breaks; fish hold just downstream of the structure waiting for food to wash past.
• The turbidity maximum zone of the Río de la Plata — where the freshwater-saltwater boundary creates a murky, productive band — is a known spawning and feeding concentration area.