Corvina de río
Corvina de río is a freshwater member of the drum family (Sciaenidae) native to the Plata basin. In Argentina it turns up in the Río Paraná and Río Paraguay systems, where anglers know it mainly as live or cut bait for bigger targets like dorado and surubí.
It's a modest-sized fish — rarely more than a pound — but its presence in the river tells you something about the health of the system.
Scientific Name: Plagioscion ternetzi
Also known as Curvina, corvina
- Elongated, laterally compressed body typical of the drum family, with a slightly arched back and large scales.
- Silvery to pale yellowish sides; darker along the dorsal surface, fading to a whitish belly.
- Reaches roughly 35 cm and around 500 g — a small fish by river standards, easily confused with juvenile corvina rubia in mixed-water zones.
What to know
Habitat Distribution
- Native to the Plata basin; in Argentina it occupies the Río Paraná and Río Paraguay drainages, including associated lagoons such as Laguna Herradura.
- Also present in the Río Uruguay catchment, extending into tributaries like the Río Queguay near the Argentine-Uruguayan border zone.
- Prefers slow to moderate river reaches, backwaters, and floodplain lagoons connected to the main channel.
Key Locations
- Río Paraná — documented throughout the Argentine stretch of the river, particularly in associated lagoons and backwaters.
- Río Paraguay / Laguna Herradura — one of the sampled stock locations in published Argentine research.
- Río Uruguay catchment — present in tributaries within the basin, including waters near the Argentine border.
Specific Spots
- Backwater lagoons and oxbows off the main Paraná channel hold concentrations, especially where organic matter settles on soft bottoms.
- Shallow, muddy margins near aquatic vegetation — the fish feeds on detritus and plant material, so soft-bottom edges are more productive than hard rocky substrate.
- Confluences and side channels where current slows and fine sediment accumulates tend to concentrate this species.
Corvina de río FAQ
Answers from onWater's species guide.
What are the best lures and bait for Corvina de río?
Natural baits fished on the bottom, worms, small pieces of cut fish, or organic matter, are the practical choice given this species feeds on detritus rather than chasing prey. More commonly, anglers catch corvina de río incidentally or net them specifically to use as live bait for dorado and surubí.
How do you catch Corvina de río?
Anglers in Argentina rarely target corvina de río as a sport fish in its own right. It's most often caught incidentally on bottom rigs or netted deliberately to serve as live bait for larger predators, dorado and surubí, in the Paraná and Paraguay river systems.
What do Corvina de río eat?
Feeds on aquatic plants, bottom detritus, and organic mud, a detritivore rather than a predator, which is why it rarely takes lures but responds to natural baits fished on or near the bottom.
Where do Corvina de río live?
Native to the Plata basin; in Argentina it occupies the Río Paraná and Río Paraguay drainages, including associated lagoons such as Laguna Herradura. Also present in the Río Uruguay catchment, extending into tributaries like the Río Queguay near the Argentine-Uruguayan border zone.
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