MS: minimum 40 cm
40 cmMS
Minimum size for jurupoca in MS.
Source: Decreto estadual MS nº 15.375/2020 (amends Decreto nº 15.166/2019), art. 9º - Semadesc/Imasul
fishing forecast
porthole shovelnose catfish
Hemisorubim platyrhynchos · Pimelodidae · predator
Freshwater
Catfish with a duck-bill snout and large spots. It shows up in night bottom fishing in the Pantanal and Paraná, along with cachara and barbado.
Also called: jurupoca, jiripoca
- common size
- 35–50 cm
- maximum
- 61 cm
- common weight
- 0.5–2 kg
- record/max.
- 2.7 kg
- depth
- 1–8 m
- ideal water
- 24–30 °C
fishing forecast
the right time
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…
0—
index Score from 0 to 100 for the fishing conditions of each hour. It reads weather, sun, moon, tide and the species' habits. It doesn't promise fish: it tells you when the water is on your side. 0–24 poor · 25–44 fair · 45–64 good · 65–84 very good · 85–100 excellent.
today
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confidence —
confidence How much you can trust the weather forecast for the day. It drops with distance and when the models disagree. It is not the chance of catching fish.
models and trend Up to 16 days, three global weather models (the European ECMWF, the American GFS and a high-resolution blend) read hour by hour; when they disagree, the light band on the chart widens. Beyond that it's a trend: 31 runs of the American GEFS model. Confirm when it's 1 week out.
window Consecutive hours with the index near the day's peak and no danger alert. It is the time to have the bait in the water.
hour by hour
slide your finger or mouse over the chart to see each hoursee hour-by-hour table
why this index at —?
next 7 days
chart: bar height = day's index · line = variation between models · striped = trend · fainter = less confidencechoose 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.
4-week calendar
the fishing month at a glance
plan a trip
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.
the species
everything about the porthole shovelnose catfish
overview
who is the porthole shovelnose catfish
Medium-sized leather catfish, common in the Pantanal and the big rivers of the Paraná and Amazon basins. Hunts at night on sand beaches, slack water and cutbanks, eating small fish and shrimp. Often shows up as bycatch when bottom fishing for cachara and pintado. Fights little, but is easy to catch and has very good meat. Pantanal anglers recognize it by its broad, flat head with the lower jaw jutting out. Minimum 40 cm in MS and MT.
fun facts
- Easy to identify by its chin, which projects forward.
- In the Pantanal it is common on the same trips as cachara and barbado.
how to recognize it
identification
Very wide, flat head like a duck's bill, with the lower jaw longer than the upper. Light grey to yellowish body, with a few large, round dark spots, widely spaced. Pintado and cachara have a bigger upper jaw, a longer head and a much denser pattern of spots or stripes.
distribution
open on the large map where found
Pantanal rivers (Paraguay, Cuiabá, Miranda, Taquari), the Paraná River channel and large tributaries; also the Amazon and Araguaia.
Habitat: Sand beaches, slack water, cutbanks and bay mouths at night.
native to the basins
Paraguay (Pantanal)ParanáAmazonTocantins-Araguaia
states
Mato Grosso do Sul, Mato Grosso, São Paulo, Paraná, Goiás, Amazonas, Pará, Tocantins
famous destinations
when to fish
best season
time of yearbest: Aug–Oct
JanFebSeaAprMayJunJulAugSepOctNovDec
Falling water and dry season in the Pantanal, April to October.
best time of day
Nighttime. Active at night, mostly in the first hours after sunset.
what affects the porthole shovelnose catfish
sensitivity The little bars show how much each factor affects this species. Five full: it feels it a lot.
sensitivity The little bars show how much each factor affects this species. Five full: it feels it a lot.
cold and cold fronts
A cold snap (friagem) reduces activity.
atmospheric pressure
Little known effect.
moon
Dark nights favor the shoreline.
rain
Little effect.
water level
Exposed sand beaches during the dry season are good spots.
noise
Anchor quietly.
wind
Little effect.
depth
Shallow at night, 1 to 4 m.
how to fish
- rod
- 6', medium action, 15 to 30 lb
- spinning / baitcasting reel
- spinning reel 3000 to 4000 or baitcasting reel 100 to 200
- line
- braided line 20 to 40 lb
- leader
- monofilament 40 to 60 lb
- hook
- 3/0 to 5/0; olive sinker 20 to 40 g
natural baits
- tuvira
- lambari
- muçum
- minhocuçu
accessories
- alicate
- headlamp
tip from an angler
Bait on the bottom, at the transition from sand beach to channel, right after dark.
ready-made kit
pantanal drifting and bank fishing (catfish)
Fishing for surubim catfish, cachara and jau catfish in the Pantanal and rivers of the Paraguay basin, with natural bait, drifting downriver by boat or staying still at the bank and in the pool.
guidetrolling (rodada) and steep-bank fishing in the pantanal
How to rig your gear, choose bait, feel the bottom, decide between anchoring and trolling, the best times, and respect for fishing guides and riverside communities.
rules for the porthole shovelnose catfish
Summary of the regulations we found, with the source for each. Rules change; before keeping or transporting fish, check with the state environmental agency.
MT: minimum 40 cm
40 cmMTParaguay (Pantanal)
Minimum size in the Paraguay basin in MT.
Source: Lei estadual MT nº 9.096/2009, art. 28 and Annex I (Paraguay Basin) - Sema-MT
Minimum size: 40 cm
MSParaguay (Pantanal)Paraná
Source: Decreto estadual MS nº 15.166/2019, art. 9º (as amended by Decreto nº 15.375/2020)
Minimum size: 40 cm
MTParaguay (Pantanal)
Minimum size: 25 cm
PRParanáSoutheast Atlantic
Source: Portaria IAT nº 650/2025, Annex I (interior basins of PR, except Iguazu and coastal)
Minimum size: 30 cm (max. 55 cm)
TOTocantins-Araguaia
Source: Portaria Naturatins nº 47/2026, Annex I, as amended by Portaria nº 105/2026
piracema closures in the basins where the species lives
Spawning closure (piracema) in the Paraná River basin
01/11 to 28/02SPPRMGGOMSDF
Allowed: Recreational fishing only for non-native species and hybrids (peacock bass, tilapia, black bass, carp, croaker, etc.; piauçu remains prohibited), with handline, simple pole, or rod with spinning or baitcasting reel, up to 10 kg + 1 fish. In rivers, from shore only; in reservoirs, from a boat or from shore. Prohibited: floodplain lakes, aquatic-animal bait, within 1,500 m of dams and waterfalls, and within 500 m of confluences. Tournaments only in reservoirs and only with non-native species.
Source: IN IBAMA nº 25/2009
Spawning closure (piracema) in Minas Gerais (state rule)
01/11 to 28/02MG
Allowed: Only exotic or hybrid species, 3 kg + 1 fish per day, with handline, rod, simple pole, or spinning or baitcasting reel. Nets prohibited. Keep the minimum distances from dams and reservoirs.
Source: Portarias IEF nº 154/2011 (São Francisco), 155/2011 (East) and 156/2011 (Grande/Paranaíba)
Closed season in Goiás (state rule)
01/11 to 28/02GO
Allowed: Sport and guided fishing only in reservoirs, catch and release with barbless hooks (no keeping, transporting or eating). Subsistence: up to 5 kg per day, for household consumption only.
Spawning closure (piracema) in the Pantanal of Mato Grosso do Sul
05/11 to 28/02MS
Allowed: Subsistence fishing by riverside residents and authorized scientific fishing. Decree 15.166/2019 (art. 11, §5) allows catch and release only in February and only in the channels of the Paraguay and Paraná rivers. For the rest of the period, not even catch and release is allowed. Check the Imasul portaria for each season.
Source: Decreto estadual MS nº 15.166/2019, art. 11; IN IBAMA nº 201/2008
Spawning closure (piracema) in Mato Grosso (all basins)
01/10 to 31/01MT
Allowed: All fishing modalities are prohibited in rivers, including catch and release (Law 9.096/2009, art. 19-A). Exceptions: subsistence fishing from shore (3 kg or 1 fish, no transport or sale) and scientific fishing. Law 13.159/2025 now allows licensed sport fishing in UHE/PCH hydropower reservoirs, natural lakes and border rivers, subject to a scientific study and a license from the environmental agency. We have not confirmed whether these licenses are already being issued.
Spawning closure (piracema) in the Araguaia River basin
01/11 to 28/02GOTOPAMT
Allowed: Recreational fishing only in reservoirs, with handline, rod, or spinning or baitcasting reel. Fish may only be eaten on site, not transported. Competitions prohibited. Subsistence: 3 kg + 1 fish. State rules (GO and TO) may be stricter.
Spawning closure (piracema) in the Tocantins and Gurupi river basins
01/11 to 28/02TOPAMAGO
Allowed: Recreational fishing only in reservoirs, with on-site consumption. Subsistence: 5 kg + 1 fish. State rules may be stricter.
Spawning closure (piracema) in Tocantins (state rule)
01/11 to 28/02TO
Allowed: In 2025/26: catch and release with barbless hooks and recreational fishing card; subsistence fishing on foot or from a rowboat, with simple pole or handline.
Source: Portaria Naturatins nº 244/2025 (2025/26 season); INIs MPA/MMA nº 12 and 13/2011
Closed season in the rivers of Marajó Island (PA)
01/01 to 30/04PA
Allowed: The same recreational-angler exceptions as in Portaria 48/2007 apply (handline or rod, 5 kg + 1 fish), unless a stricter state rule applies.
Source: Portaria IBAMA nº 48/2007
Closed season in the Amazon basin in Amapá
15/11 to 15/03AP
Allowed: Recreational anglers with handline or rod, line and hook are outside the Annex II prohibitions, with a bag limit of 5 kg + 1 fish, unless a stricter state rule applies.
Source: Portaria IBAMA nº 48/2007
Closed season in Roraima
01/03 to 30/06RR
Allowed: Subsistence fishing only.
Source: Portaria IBAMA nº 48/2007
Border rivers MT/RO and MT/PA
05/11 to 28/02MTROPA
Allowed: See the exceptions in Portaria 48/2007 and the state rules for each bank.
Source: Portaria IBAMA nº 48/2007
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.
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.
Hold it by the nape, away from the pectoral spines, and release it in the water.
in the kitchen
White, tender, boneless meat; very good fried or in broth.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.00692, b = 3.11; FishBase). It's an average: a fat or lean fish can vary by 10% to 20%.
estimated weight
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sources and references
The season weights (months), the time of day and the sensitivities (cold, pressure, moon, wind, rain, tide, strong light, murky water and noise) are the app's editorial estimates, based on the literature below and on the field experience of anglers and guides. They are not official data nor a measurement made for this species, and they may vary by region and year. Closed seasons and legal rules appear in the rules section, with the norm and a link.
- scientific FishBase — Hemisorubim platyrhynchos (ficha da espécie)Names, distribution, biology, length-weight relationship and references. Page checked on October 13, 2026.
- official Portaria GM/MMA nº 1.667, de 27 de abril de 2026 — Lista Nacional Oficial de Espécies da Fauna Ameaçadas de Extinção (peixes e invertebrados aquáticos)Most recent national list. The species is not on it (search by scientific name in the text published in the DOU, checked on October 13, 2026).
- official ICMBio/SALVE — Ficha de Hemisorubim platyrhynchos (avaliação nacional do risco de extinção)National assessment by ICMBio, published in 2023. DOI verified on Crossref.
- scientific IUCN Red List — Hemisorubim platyrhynchos (avaliação global: Pouco Preocupante, LC, 16/12/2020)Global assessment. Link given on the FishBase entry (Red List, version 2025-2).
- scientific Britski, H. A.; Silimon, K. Z. S.; Lopes, B. S. (2007). Peixes do Pantanal: manual de identificação. 2ª ed. Brasília: Embrapa Informação Tecnológica. 227 p.Printed work; the URL is the bibliographic record on FishBase, which cites this work for the species.
- scientific Ota, R. R.; Deprá, G. C.; Graça, W. J.; Pavanelli, C. S. (2018). Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated. Neotropical Ichthyology 16(2): e170094.Annotated list of species of the upper Paraná River, indicating native and non-native ones. Open access; species name checked in the text.
similar species
how we calculate
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: