magellanic rockcod
Paranotothenia magellanica · Nototheniidae · omnivore
A cold-water fish of the far south of South America, caught more by commercial fishing than by sport anglers.
Also called: nototênia-magalhânica, trama común, magellanic rockcod
- maximum
- 43 cm
- record/max.
- 1.5 kg
- depth
- 0–20 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 magellanic rockcod
who is the magellanic rockcod
A fish of the family Nototheniidae, with a spindle-shaped body and a short, flattened snout, typical of the cold waters of the southern tip of the continent. It reaches 43 cm and up to 1.5 kg. It usually lives 0 to 20 m deep, but can be found down to 255 m. It also occurs around islands of the Southern Ocean, such as the Falklands, South Georgia, the South Orkneys and the South Shetlands, and in southern New Zealand. It has an olive gray back and a yellowish belly. It is used as food and enters commercial fishing; it almost never shows up on the sport angler's line.
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 magellanic rockcod; in the meantime, see the similar species.
identification
Olive gray back and yellowish belly. Short, flat snout, head with well-marked bones and a short jaw whose tip does not reach the eye. The caudal peduncle is longer than it is deep, and the pelvic fins are much shorter than the pectorals. In the same region lives the yellow notothenia, which has yellow fins and reaches 25 cm, much smaller than this one.
where found
It lives in the cold waters of the far south of South America, in Argentina and Chile, and around islands of the Southern Ocean.
Habitat: Cold waters, usually 0 to 20 m deep, and down to 255 m.
rules for the magellanic rockcod
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 dangerous. Hold it by the body, with wet hands, and release it quickly.
in the kitchen
A food fish, mainly caught by commercial fishing.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.00676, b = 3.24; 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: Paranotothenia magellanica (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Paranotothenia magellanicaNames 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: