longnose spurdog
Squalus blainville · Squalidae · predator
Longnose dogfish from shelves and slopes of Argentina, Uruguay and Chile. It is caught more often in nets and in commercial fishing.
Also called: cação-de-focinho-longo, galludo, pinchuo, longnose spurdog
- maximum
- 122 cm
- record/max.
- 7.3 kg
- depth
- 15–1,500 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 longnose spurdog
who is the longnose spurdog
The longnose dogfish belongs to the family Squalidae and reaches 122 cm and 7.3 kg. It lives on continental shelves and slopes, from 16 to 440 m deep, and forms schools. It feeds on bony fish, such as mackerel and other bottom fish, and also on crabs, lobsters and octopus. It is ovoviviparous, with 3 to 4 pups per litter, born at 23 cm. Its meat is eaten fresh, dried, salted or smoked. It is caught by commercial fishing.
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 longnose spurdog; in the meantime, see the similar species.
fun facts
- Pups are born at 23 cm.
identification
Elongated shark with a long snout, which gives the species its name. Like other dogfish, it has spines on the dorsal fins. On the same Uruguayan coast lives the catfish shark, Squalus megalops, which has a short, angular snout. Snout length is the main trait for telling the two apart.
where found
Occurs in Argentina, Uruguay and Chile, on shelves and slopes, 16 to 440 m deep. Records of this species in the southwestern Atlantic and in Chile may include similar species.
Habitat: Continental shelves and slopes, on the bottom, 16 to 440 m deep.
rules for the longnose spurdog
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.
Shark with no serious danger, but with spines on the dorsal fins, like other dogfish. Hold it with care and release it with minimal handling.
in the kitchen
Eaten fresh, dried, salted or smoked, the meat is used as food.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.00331, b = 3.06; 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: Squalus blainville (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Squalus blainvilleNames 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: