carp headstander
Cyphocharax magdalenae · Curimatidae · detritivore
Carp headstander from the Magdalena and Atrato rivers, in Colombia, and from rivers of Panama and Costa Rica, up to 27 cm. It is of no interest to anglers.
Also called: branquinha-do-magdalena, campiniz, corito, carp headstander
- maximum
- 27 cm
- record/max.
- 0.3 kg
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.
Reading the weather across 3 global models and 31 simulations…
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hour by hour
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why this index at —?
choose the day
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.
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 carp headstander
who is the carp headstander
The carp headstander is a freshwater curimatid, reaching 27 cm and 290 g. It lives in the Magdalena and Atrato river basins, in Colombia, in rivers of the Pacific of Panama and in southwestern Costa Rica. It stays in midwater and in shallow stretches of sand or mud, with moderate current. It feeds only on detritus, algae and diatoms. It is of no interest to sport anglers and poses no danger to anglers. Campiniz, corito and plateada are local names.
Essential profile. Identification, where it occurs and rules, with data from FishBase and the cited regulations. Season, time of day, technique and bait are added once we have a good source for the carp headstander; in the meantime, see the similar species.
identification
Fusiform body of a curimatid, without the series of dark stripes that other Cyphocharax have. No large spot on the body or dorsal fin, no spot or dark band on the caudal peduncle, and the peduncle is slender. Its plain coloring separates it from most species in the genus.
where found
Magdalena and Atrato basins in Colombia, rivers in Panama and Costa Rica, and records from Venezuela. Does not occur in Brazil.
Habitat: Rivers with moderate current and shallow stretches with sand or mud bottoms.
rules for the carp headstander
Summary of the regulations we found, with the source for each. 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.
catch and release
catch and release Releasing the fish alive, quickly and with a wet hand. During a closed season it isn't always allowed: what the regulation says applies.
River fish: if caught by mistake, release it with wet hands.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.02455, b = 2.96; FishBase (relação peso-comprimento bayesiana, estimativa da própria espécie)). It's an average: a fat or lean fish can vary by 10% to 20%.
estimated weight
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sources and references
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: Cyphocharax magdalenae (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Cyphocharax magdalenaeNames by country and language.
similar species
where 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: