steindachner's cichlid
Herichthys steindachneri · Cichlidae · predator
Cichlid endemic to Mexico, from rivers of the Atlantic slope, reaching 40 cm and threatened with extinction, so it is best returned to the water.
Also called: ciclídeo-esbelto, mojarra del Ojo Frío, slender cichlid, steindachner's cichlid
- maximum
- 40 cm
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
tap or drag on the chart to read each hour · on a keyboard, arrow keyssee hour-by-hour table
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 steindachner's cichlid
who is the steindachner's cichlid
Cichlid of the family Cichlidae reaching 40 cm. It is endemic to Mexico and lives in three rivers of the Pánuco basin: Tamasopo, Gallinas and Ojo Frío. It stays near the bottom and also in the water column, in alkaline water with pH between 7.8 and 8.3. The species does not migrate. It feeds on snails and smaller fish, and the female guards the eggs and larvae. Although it is threatened, it still appears in commercial fishing and the aquarium trade.
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 steindachner's cichlid; in the meantime, see the similar species.
fun facts
- The female does most of the guarding of the eggs and larvae.
identification
Freshwater cichlid up to 40 cm that lives only in three rivers of the Pánuco basin, in Mexico. In the same basin, Herichthys bartoni, reaching 18 cm, and Herichthys labridens, reaching 25 cm, live in the Media Luna lagoon system and the upper Río Verde, and they are smaller. Its slender body gives the species its name.
where found
Endemic to Mexico, in the Tamasopo, Gallinas and Ojo Frío rivers, in the Pánuco basin.
Habitat: Rivers of the Pánuco basin, with alkaline water, near the bottom and in the water column.
rules for the steindachner's cichlid
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.
It poses no danger to anglers, but the fin spines can prick the hand. As it is threatened, release it quickly, with a wet hand, and avoid keeping the fish out of the water.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.02951, b = 3.03; FishBase (relação peso-comprimento bayesiana, estimativa)). 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: Herichthys steindachneri (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Herichthys steindachneriNames 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: