South American Silver Porgy
The South American silver porgy is a native saltwater species found along Argentina's Atlantic coast, from Buenos Aires province down into northern Patagonia.
A compact, reef-associated fish that rarely tops 35 cm, it's a popular target for shore and pier anglers working rocky coastline and shallow reefs — the kind of fish that keeps a rod bent while you wait for something bigger.
Scientific Name: Diplodus argenteus
Also known as Sargo, sargo plateado
- Silvery to silver-gold body, sometimes with a yellowish tint on the scales and fins; up to 8–9 faint vertical dark bars visible on the upper body, especially in juveniles.
- Most reliable ID mark: a bold black blotch, larger than the eye, sitting on the upper half of the caudal peduncle (the narrow base of the tail).
- Deep, oval, laterally compressed body with a small pointed snout, small front-opening mouth, and a forked tail with rounded lobes.
- Typical catch runs 15–25 cm; max recorded length around 38 cm and up to roughly 2.5 kg, though fish over 1 kg are noteworthy.
What to know
Habitat Distribution
- Native to the southwestern Atlantic; in Argentina it occupies the continental shelf coastline from Buenos Aires province southward into northern Patagonia.
- Reef-associated: prefers shallow, clear coastal water over rocky bottoms, coral rubble, and mixed rock-sand substrate, typically from the surface down to about 15 m.
- Also found around submerged vegetation and hard structure in clean inshore zones; avoids turbid or heavily silted water.
Key Locations
- Buenos Aires province coastline — rocky shore and reef areas along the Atlantic coast are the core of the Argentine range.
- Northern Patagonia coast — a documented range extension; fish have been recorded here in recent decades as the species pushes south.
Specific Spots
- Rocky points and reef edges where current pushes food past stationary fish — sargo hold just behind the break in flow rather than fighting it.
- Shallow reef shelves and boulder fields in 2–10 m of water; the fish graze the bottom here, working over encrusted rock for invertebrates.
- Pier and jetty pilings with barnacle and mussel growth attract sargo because the structure concentrates the shellfish and crustaceans they feed on.
- Weed patches adjacent to hard bottom give juveniles cover and a reliable food source; worth working the edges where rock meets sand.
South American Silver Porgy FAQ
Answers from onWater's species guide.
What are the best lures and bait for South American Silver Porgy?
Natural baits work best: small pieces of shrimp, mussel, or crab fished on the bottom near rocky structure are the standard approach along Argentina's coast.
What flies work for South American Silver Porgy?
Crab and shrimp patterns, small Merkin-style crab flies or EP Shrimp imitations, fished on or near the bottom match the sargo's primary diet and are the most reliable fly choice over rocky reef.
When is the best time to fish for South American Silver Porgy?
Spring and summer (October–March) bring the warmest inshore water temperatures and the most reliable sargo activity along the Buenos Aires and northern Patagonia coast.
How do you catch South American Silver Porgy?
Shore and pier fishing accounts for most sargo caught in Argentina. Anglers work rocky points, jetties, and shallow reef edges with light spinning gear and natural baits fished on the bottom. The fish are grazers, so slow presentations near structure consistently beat fast retrieves.
What do South American Silver Porgy eat?
Primarily bottom-dwelling invertebrates: barnacles, mussels, sea urchins, small crabs, and shrimp. Their strong incisor-like front teeth and molar-like side teeth are built to crush hard-shelled prey, small crab or shrimp imitations, and soft-plastic crustacean patterns, match this feeding style well.
See it in the app
Most maps show you water.
onWater shows you South American Silver Porgy.
- 01 · Species map filter
Map every South American Silver Porgy water
Pick South American Silver Porgy and the map zeroes in on the waters they call home. No more guessing which lake holds them.
- 02 · Waterbody species
Tap any water. See what lives there.
Species, behavior and seasonal patterns for every lake, river and pond, before you leave the driveway.
- 03 · Angler Intelligence
Ask how to catch South American Silver Porgy
Tactics, gear and timing from onWater's AI fishing guide, tuned to the species and the water you're on.
Stop guessing where South American Silver Porgy are.
Open the map, filter by South American Silver Porgy, and head to water that holds them. Download onWater and plan your next trip in minutes.
- Species map filter
- Angler Intelligence
- Fishing journal
Explore other species
Trout, bass, salmon, panfish and everything in between. Each guide unpacks the behavior, seasons, and tactics that put fish in the net.
No species information available.
Smarter Fishing Starts in the App.
onWater Fish gives you everything you need to plan smarter, fish better, and own every trip from first cast to last.