Tarango
The tarango — more widely called tararira in Argentina — is a native predatory fish of the country's northeastern river systems and lowland wetlands.
Built around a large mouth full of dog-like teeth, it holds down the top of the food chain in warm, slow, weedy water.
Anglers in the Litoral and Mesopotamia regions target it with live bait and lures, making it one of the few native warm-water sport fish in the country.
Scientific Name: Hoplias malabaricus
Also known as Tararira, wolf fish, tiger fish
- Cylindrical, muscular body with a broad, flattened head and a wide mouth lined with prominent, dog-like teeth — unmistakable up close.
- Coloration is grey-brown to olive, typically marked with darker vertical bars or a single horizontal stripe along the flank; belly is paler.
- Most fish caught run 30–50 cm; the species reaches a maximum of around 65 cm and roughly 3.8 kg, though fish over 2 kg are considered good ones.
What to know
Habitat Distribution
- Native to Argentina, found across the northeastern river systems and lowland drainages — the Río de la Plata basin, Mesopotamia, and the Litoral provinces.
- Tolerates a wide range of water types: clear upland streams, slow turbid lowland rivers, oxbow lakes, marshes, irrigation canals, and drainage ditches.
- Strongly associated with dense aquatic vegetation, submerged timber, and shallow, warm, oxygen-variable environments where few other predators thrive.
Key Locations
- Mesopotamia region (Entre Ríos, Corrientes, Misiones provinces) — the core of its Argentine range, with extensive lagoons, wetlands, and slow river arms.
- Río de la Plata basin and its tributary systems in northeastern Argentina, where warm, slow lowland water provides ideal habitat.
- Lowland lagoons and oxbow lakes (lagunas and madrejones) throughout the Litoral, particularly those with dense aquatic vegetation.
Specific Spots
- Weed edges and submerged vegetation mats — the tarango holds tight to cover and strikes from short range, so work lures right along the edge rather than through open water.
- Fallen timber, root tangles, and undercut banks in slow backwaters; these fish don't chase prey far, so placing the bait close to structure matters.
- Shallow, warm bays and lagoons connected to main river channels, especially where oxygen levels drop and competing species thin out — conditions the tarango handles better than most.
Tarango FAQ
Answers from onWater's species guide.
What are the best lures and bait for Tarango?
Live or cut baitfish fished under a float or on the bottom near structure is the most reliable traditional method, match the size of local forage species in the water you're fishing.
When is the best time to fish for Tarango?
Spring and summer (October through March) bring the warmest water temperatures and the most active feeding in the northeastern lowlands. Autumn (April–May) can still produce fish before water temperatures drop; activity slows through the cooler winter months.
How do you catch Tarango?
Most anglers fish the tarango from the bank or a small boat, working live baitfish or lures tight to weed edges, submerged timber, and flooded vegetation. Keeping the presentation close to cover, rather than in open water, is the consistent factor across methods.
What do Tarango eat?
Feeds primarily on smaller fish, whatever baitfish share its water, and will also take frogs and large invertebrates. Live or cut fish bait fished near structure is the traditional approach; soft plastic swimbaits and shallow-running minnow lures imitate the same forage.
Where do Tarango live?
Native to Argentina, found across the northeastern river systems and lowland drainages, the Río de la Plata basin, Mesopotamia, and the Litoral provinces. Tolerates a wide range of water types: clear upland streams, slow turbid lowland rivers, oxbow lakes, marshes, irrigation canals, and drainage ditches.
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