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 pacific mutton hamlet
how to recognize it
Marbled reddish-brown body, with faint bars and small dark and pale spots on the head, body and fins. The pectoral fins have small dark spots in cross bands. Body depth is equal to or less than head length, and a large spine covered in skin projects from the corner of the preopercle. Compare with the striped small grouper (Alphestes multiguttatus), which has smooth scales and an eye slightly larger than the snout. This one has an eye almost the same size as the snout.
Also called: garoupinha-do-pacífico, garoupinha, guaseta, Pacific mutton hamlet
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: Seagrass beds and shallow rocky reefs, from 1 to 50 m.
Lives in the eastern Pacific, from the northern Gulf of California to Peru, including the Galapagos Islands.
when to fish
best time of day
Nighttime. It is nocturnal: it spends the day hidden in crevices or among algae and goes out to hunt at night.
rules for the pacific mutton hamlet
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 = 0.01122, b = 3.04; FishBase (relação peso-comprimento bayesiana, estimativa)). It's an average: a fat or lean fish can vary by 10% to 20%.
more about the pacific mutton hamlet
The Pacific coral grouper belongs to the family Epinephelidae and reaches 30 cm. It lives in shallow areas of the eastern Pacific, from the northern Gulf of California to Peru, including the Galapagos Islands, on rocky reefs and seagrass beds, down to 50 m. It is a discreet species: by day it hides in crevices or among algae, and sometimes covers itself with sand. At night it eats crustaceans from the bottom. It has no interest for anglers.
Family: Epinephelidae · predator
fun facts
- It relies on camouflage to avoid being noticed and sometimes partly covers itself with sand.
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: Alphestes immaculatus (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Alphestes immaculatusNames 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: