Tararira ñata
The tararira ñata is a small, tough predator native to Brazil's major river basins, including the São Francisco, Amazon, and Paraná. It lives in swamps, slow creeks, and flooded savannas — the kind of marginal, oxygen-poor water most fish avoid.
Its ability to breathe air at the surface lets it survive where little else can, making it a surprise catch for anglers working backwater and floodplain habitat.
Scientific Name: Hoplerythrinus unitaeniatus
Also known as Aimara, gold wolffish, yarrow
- Elongated, cylindrical body with a distinctive opercular eyespot (a dark spot ringed with color on the gill cover) — the clearest field mark separating it from the related tararira (Hoplias malabaricus).
- Typically reaches around 20–28 cm; maximum recorded length is about 28.5 cm with a weight near 520 g — a noticeably smaller fish than its cousin the tararira.
- Coloration is generally brownish to olive, with a single faint lateral stripe that gives the species its scientific name (unitaeniatus = one-banded).
What to know
Habitat Distribution
- Native to Brazil; the type specimen was collected from the Rio São Francisco. Also present in the Amazon and Paraná basins.
- Lives in swamps, slow-moving creeks, and seasonally flooded savannas — low-current, often oxygen-poor environments.
- An obligate air-breather that regularly surfaces to gulp air, which allows it to persist in stagnant backwaters and isolated pools that other species cannot tolerate.
Key Locations
- Rio São Francisco basin — the type locality for the species and part of its confirmed native range in Brazil.
- Amazon basin floodplains and várzea (seasonally flooded forest and savanna) — core habitat across the Brazilian interior.
- Paraná basin backwaters and slow tributaries in central and southern Brazil.
Specific Spots
- Shallow, weedy backwaters and flooded margins — it holds tight to vegetation and debris where it can ambush prey and access the surface to breathe.
- Isolated pools and slow creek bends during dry season, when receding water concentrates fish in shrinking habitat.
- Near the surface in low-oxygen water — its air-breathing habit means it will be visible rising to breathe, which can help locate fish.
Tararira ñata FAQ
Answers from onWater's species guide.
What are the best lures and bait for Tararira ñata?
Small minnow-style hard baits and compact spinners worked slowly through shallow, weedy water match the baitfish it feeds on in backwater habitat. Small soft-plastic swimbaits or frog-style lures can be effective over flooded vegetation, where the fish holds near the surface.
How do you catch Tararira ñata?
Anglers encounter this fish incidentally while fishing backwater and floodplain habitat for related species like the tararira. Working slow, weedy margins with small lures near the surface, where the fish must come to breathe, is the most direct approach.
What do Tararira ñata eat?
Feeds primarily on smaller fish and aquatic invertebrates in the shallow, weedy habitats it occupies. Small baitfish imitations, compact minnow-style lures or streamers, are the logical starting point.
Where do Tararira ñata live?
Native to Brazil; the type specimen was collected from the Rio São Francisco. Also present in the Amazon and Paraná basins. Lives in swamps, slow-moving creeks, and seasonally flooded savannas, low-current, often oxygen-poor environments.
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