the right time
to be on the water
Choose the place and the species. The index, from 0 to 100, combines weather, sun, moon and tide with each fish's habits. Up to 28 days, with each day's confidence.
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hour by hour
slide your finger or mouse over the chart to see each hoursee hour-by-hour table
why this index at —?
choose the day
the fishing month at a glance
what's the best window for the crew?
Choose how many fishing days. We compare each stretch by its average index, discount days with a warning or closed season, and show the 3 best.
trend for the coming weeks
Line: the middle value of 31 simulations of the American GEFS model. Band: where 8 out of 10 fall. Narrow, firm trend; wide, high uncertainty.
everything about the black spot piranha
how to recognize it
Deep-bodied, silvery piranha with a dark spot behind the head that marks the species. The mouth has triangular, strong teeth, as in all piranhas. In the Orinoco basin it lives alongside the black piranha (Serrasalmus rhombeus), which is larger. It is a close relative of the red-bellied piranha (Pygocentrus nattereri), which lives in other basins, such as the Amazon and the Paraguay.
Also called: piranha-caribe, caribe colorado, caribe pinche, capaburro, piraña, black spot piranha
don't confuse with:
We don't have tips on season, bait or technique for this species yet.
where found
open on the large mapWhere to look: Lowlands of the Orinoco basin, in Venezuela and Colombia, in the midwater.
Orinoco basin and lowlands of Venezuela and Colombia, in tropical freshwater.
rules for the black spot piranha
Rules change; before keeping or transporting fish, check with the state environmental agency.
We found no species-specific rule beyond the region's general rules.
how much it weighs without taking it out of the water
estimated weight
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how we calculate
Length-weight relationship W = a·Lb (a = 0.0182, b = 3.12; FishBase (relação peso-comprimento bayesiana, estimativa)). It's an average: a fat or lean fish can vary by 10% to 20%.
more about the black spot piranha
The piranha caribe is a freshwater serrasalmid of the family Serrasalmidae, reaching 27.9 cm and weighing up to 560 g. It occurs in the lowlands of the Orinoco basin, in Venezuela and Colombia, in tropical water. It lives mainly in the midwater and is a fish predator. It has powerful teeth, capable of causing serious bites. It is sought after in recreational fishing, which makes it a species of interest for rod anglers in the region.
Family: Serrasalmidae · predator
similar species
sources and references (2)
Essential profile: size, length-weight, depth, countries and conservation come from FishBase and the cited regulations, and the texts were written from those sources. Season, time of day, sensitivities, technique and baits and lures are not included yet, because we did not find a good source for this species.
- scientific FishBase: Pygocentrus cariba (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Pygocentrus caribaNames by country and language.
how we calculatewhere each number comes from
The weather comes from three independent global models, cross-checked hour by hour: when they agree, confidence goes up; when they diverge, the band between them shows on the chart. Beyond 16 days, we use the GEFS ensemble of 31 simulations: if 20 of the 31 predict rain, the chance of rain is 65%. Sun and moon are calculated astronomically, with no uncertainty.
The index adds up, weighted for each species: time of day (species curve anchored to real sunrise and sunset), moon (transits, rise and set, phase), pressure (3 h trend and 24 h swing), water temperature (in rivers, estimated from air temperature; at sea, estimated by an ocean model), wind, rain, clouds, tide and the month in the species' cycle.
sources for this lookup
how accurate the forecast is
Accuracy measured in the reference project (4 regions, 93 days, forecast vs. observed): maximum temperature is off by 0.6 °C on average the next day and 1.7 °C at 7 days; rain of 5 mm or more is detected 76% of the time the next day and 57% at 7 days. Detection isn't everything: the false alarm rate isn't published here yet, and 93 days in 4 regions is still a small sample. We now also measure every day, at the app's destinations: