cabinza grunt
Isacia conceptionis · Haemulidae · omnivore
Grunt of rocky and sandy bottoms in the South American Pacific, from Peru to Chile, commercially fished.
Also called: roncador-cabinza, cabinza, cabinza grunt
- maximum
- 60 cm
- depth
- 0–50 m
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
slide your finger or mouse over the chart to see each hoursee 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 cabinza grunt
who is the cabinza grunt
The cabinza grunt belongs to the family Haemulidae, the grunts. It reaches 60 cm. It lives in the South American Pacific, from Peru to Chile, over rocky and sandy bottoms, from the shore down to 50 m. Its diet mixes small crustaceans, such as isopods and amphipods, with polychaetes and algae. Commercial fishing takes it, and it has little prominence in sport fishing. There are also records of the species in Nicaragua.
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 cabinza grunt; in the meantime, see the similar species.
identification
A fish with the typical shape of grunts, family Haemulidae. It lives over rocky and sandy bottoms, from the shore down to 50 m, in South American Pacific waters. It can be confused with the chita, which lives on the same coast and also occupies hard bottoms and rocky reefs.
where found
Found in the South American Pacific, from Peru to Chile, with records also in Nicaragua.
Habitat: Rocky and sandy bottoms, from the shore to 50 m.
rules for the cabinza grunt
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.
No danger to anglers. If released, return it to the water carefully.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.01202, b = 2.97; 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: Isacia conceptionis (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Isacia conceptionisNames 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: