splitnose rockfish
Sebastes diploproa · Sebastidae · predator
Red rockfish of soft bottoms in the open North Pacific, which in Mexico ranges from Baja California to the Gulf of California. It is sometimes sold as fillets.
Also called: garoupa-focinho-duplo, rocote doble hocico, splitnose rockfish
- maximum
- 46 cm
- record/max.
- 0.8 kg
- depth
- 91–579 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
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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 splitnose rockfish
who is the splitnose rockfish
Rockfish of the family Sebastidae, genus Sebastes, living in open sea over soft bottoms, 0 to 800 m, most common between 91 and 579 m. It grows to 46 cm and up to 810 g. Juveniles stay in shallow water, sometimes at the surface under drifting kelp. It is viviparous, with planktonic larvae and pelagic juveniles. It is rarely caught by sport anglers. Its range runs from the Alaska Peninsula to the Gulf of California.
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 splitnose rockfish; in the meantime, see the similar species.
fun facts
- The young are born in spring.
- Individuals 86 years old have been recorded.
identification
Red rockfish, silvery underneath, with a toothed knob at the front of each upper jaw and a deep cleft between the two jaws. The head has strong spines, but there are no spines on the nape or crown, and the caudal fin is moderately notched. Compare it with the chilipepper rockfish, which has a bright red lateral line and a projecting chin, and with the rosy rockfish, which lives on rocky bottoms.
where found
Lives in the northeast Pacific, from the Alaska Peninsula to Cedros Island, Baja California, and the Gulf of California, Mexico. In Latin America, it occurs only in Mexico.
Habitat: Soft bottoms of open sea, 0 to 800 m, most common between 91 and 579 m.
rules for the splitnose rockfish
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 is not venomous, but it has strong spines on the head. As it lives at depth, it suffers barotrauma if reeled up quickly; release it carefully.
in the kitchen
The largest specimens are sometimes sold as fillets in the market.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.01, b = 3.09; FishBase (relação peso-comprimento bayesiana, estimativa pelo gênero e formato do corpo)). 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: Sebastes diploproa (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Sebastes diploproaNames 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: