Cichla orinocensis · Cichlidae · predator
Peacock bass with three ocelli on the flank, a companion of the açu on the Rio Negro. Smaller, but very numerous and aggressive.
Also called: borboleta, tucunaré-borboleta
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.
Reading the weather across 3 global models and 31 simulations…
Each card shows the day's index (0 to 100) and, below it, a strip with the index for each hour, from 0h to 23h. from poor to excellent.
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.
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.
Shares the blackwater rivers of the upper and middle Rio Negro and of the Roraima tributaries with the speckled peacock bass. It is smaller and more numerous, and tends to move in groups that hit the same lure one after another. It prefers lakes, eddies and banks with timber and rock, always in clear or black water. In the dry season it forms large concentrations in isolated lakes and igarapé mouths, and keeps the action going until the açu shows up. It takes smaller lures and is a great target for light tackle and fly. It also breeds in pairs, with a nest and care of the young.
Three round black spots with a light ring in the middle of the flank, like butterfly eyes, in place of the vertical bars. Black ocellus also at the base of the tail. Golden to greenish body and reddish lower fins. The açu and the yellow have vertical bars. The popoca has faint bars, without round ocelli on the flank. It rarely exceeds 5 kg.
Rio Negro basin (Barcelos, Santa Isabel, São Gabriel and tributaries), blackwater rivers of southern Roraima and the Orinoco basin.
Habitat: Blackwater lakes, eddies, rock and timber banks, beaches and igarapé mouths in the dry season.
native to the basins
states
Amazonas, Roraima
Same season as the açu: dry season from September to December on the Rio Negro and from December to March in the Roraima tributaries.
Daytime, with peaks at dawn and dusk. Active by day, with stronger strikes early in the morning and late in the afternoon.
Friagem shuts activity down for 1 to 2 days.
Stable weather helps.
Small effect.
Light rain doesn't bother it.
Dry season concentrates fish. Repiquete scatters and breaks up the schools.
Sensitive to motor noise along the bank; approach with the electric motor.
Light chop helps at the surface.
Shallow, 0.5 to 3 m.
lures
natural baits
accessories
When a borboleta strikes, cast again to the same spot: there's usually a group.
Summary of the regulations we found, with the source for each. Rules change; before keeping or transporting fish, check with the state environmental agency.
Conservation: Not on the national list (Portaria GM/MMA 1.667/2026).
In the Rio Negro basin, from the Colombian border to the mouth of the Rio Branco, commercial peacock bass fishing is banned. Amateur and sport fishing remain allowed, but the fish may only be eaten by the angler himself.
Source: Decreto estadual nº 31.151/2011 (AM), Ipaam enforcement
In the Água Boa do Univini, Itapará, Xeruini and Jufari rivers, commercial and amateur peacock bass fishing is banned; only riverside subsistence applies (up to 7 fish per boat), along with catch-and-release sport fishing by licensed operators. Original term of 5 years from November 2021; extension to 10 years approved by the ALE-RR in 2025, enactment not confirmed. Confirm with the state agency (Femarh).
Source: Lei estadual nº 1.540/2021 (RR); PL 167/2024 (extension)
Transport, storage and sale are fully prohibited for 5 years from Jan 1, 2024 for: cachara, caparari, dorado, jaú, matrinchã (Brycon spp.), pintado/surubim (Pseudoplatystoma spp.), piraíba, piraputanga, pirarara, arapaima (pirarucu), trairão and peacock bass (tucunaré, Cichla spp.). For recreational anglers: catch and release only. These 12 species may not even be eaten on site, since the 2 kg or 1 fish limit excludes the art. 19-B list. The law cites jaú as Zungaro zungaro; we also include the Pantanal jaú (Z. jahu) out of caution. The list may still change: § 2 (exotic and predatory species), § 3 (review through study) and the 3-year assessment planned for 2027. A TJMT news report of Jun 2, 2026 confirms the 12 prohibited species. The STF denied a preliminary injunction in the ADIs against the law in 2024; we found no merits ruling.
Commercial and recreational peacock bass fishing is prohibited in the Água Boa do Univini, Itapará, Xeruini, Jufari and Jauaperi rivers and their tributaries. Only sport fishing, by companies licensed by Femarh with a maximum of 2 barbless hooks per bait, and subsistence fishing by riverside residents, are allowed.
Source: Lei estadual RR nº 1.540/2021, amended by Lei nº 2.112/2025
Allowed: All fishing modalities are prohibited in rivers, including catch and release (Law 9.096/2009, art. 19-A). Exceptions: subsistence fishing from shore (3 kg or 1 fish, no transport or sale) and scientific fishing. Law 13.159/2025 now allows licensed sport fishing in UHE/PCH hydropower reservoirs, natural lakes and border rivers, subject to a scientific study and a license from the environmental agency. We have not confirmed whether these licenses are already being issued.
Allowed: The same recreational-angler exceptions as in Portaria 48/2007 apply (handline or rod, 5 kg + 1 fish), unless a stricter state rule applies.
Source: Portaria IBAMA nº 48/2007
Allowed: Recreational anglers with handline or rod, line and hook are outside the Annex II prohibitions, with a bag limit of 5 kg + 1 fish, unless a stricter state rule applies.
Source: Portaria IBAMA nº 48/2007
Allowed: Subsistence fishing only.
Source: Portaria IBAMA nº 48/2007
Allowed: See the exceptions in Portaria 48/2007 and the state rules for each bank.
Source: Portaria IBAMA nº 48/2007
Medium fish, easy to handle. Lip grip (boga) in the mouth, quick photo and back in the water.
White, tasty flesh, like the other peacock bass. In the region it is eaten grilled over coals.
Length-weight relationship W = a·Lb (a = 0.01175, b = 3.07; FishBase (bayesiano, espécie + gênero)). It's an average: a fat or lean fish can vary by 10% to 20%.
estimated weight
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The season weights (months), the time of day and the sensitivities (cold, pressure, moon, wind, rain, tide, strong light, murky water and noise) are the app's editorial estimates, based on the literature below and on the field experience of anglers and guides. They are not official data nor a measurement made for this species, and they may vary by region and year. Closed seasons and legal rules appear in the rules section, with the norm and a link.
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.
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:
Your location is saved only on this device and feeds the forecast, the map and the "today" on the home page.
