Awaous banana · Gobiidae · omnivore
River goby of clear, flowing rivers, from Florida and Mexico to northern South America, reaching 30 cm. In Brazil there are few old records from coastal rivers.
Also called: gobião-de-rio, gobio de río, guavina, lamearena, river goby
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…
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.
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.
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 gobião-de-rio belongs to the family Gobiidae and reaches 30 cm standard length, with females smaller, up to 24.4. It lives in rivers and streams of clear water, over sand and gravel, but also appears in murky waters over mud bottoms. It prefers flowing, well-oxygenated water. It is amphidromous: it migrates between fresh water and the sea. It feeds mainly on filamentous algae. It occurs from the southern United States and the Antilles to northern South America, and in the Pacific from Mexico to Peru. It has commercial use.
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 river goby.
Elongated goby, with two separate dorsal fins and the pelvic fins joined into a sucker, as in gobies in general. In Brazil, records are few and old, in coastal rivers between Bahia and Paraná. It reaches 30 cm and lives in flowing water, over sand and gravel.
Occurs from Florida and Mexico to Venezuela and, in the Pacific, to Peru, in countries such as Mexico, Cuba, Colombia, Ecuador and Peru. In Brazil there are few old records from coastal rivers, between Bahia and Paraná.
Habitat: Rivers and streams of clear, flowing water over sand and gravel, and murky waters over mud bottoms, with passages through the estuary.
native to the basins
coast
Summary of the regulations we found, with the source for each. Rules change; before keeping or transporting fish, check with the state environmental agency.
Conservation: Not on the Brazilian national list (Ministerial Ordinance GM/MMA No. 1.667/2026).
We found no species-specific rule beyond the region's general rules.
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)
Allowed: Recreational fishing from a boat or from shore, with a single hook, one gear per angler, up to 5 kg.
Source: IN IBAMA nº 197/2008
Allowed: In rivers, shore fishing only; in reservoirs, from a boat or from shore. Only non-native species, hybrids, and giant river prawn (camarão-gigante-da-malásia), up to 10 kg + 1 fish. Prohibited in floodplain lakes and within 1,000 m of dams.
Source: IN IBAMA nº 195/2008
Allowed: Same rules as the Southeast basins: only non-native species and hybrids, up to 10 kg + 1 fish; in rivers, shore fishing only.
Source: IN IBAMA nº 196/2008
No venom and no dangerous spines. Hold it with a wet hand, remove the hook without forcing it and release it quickly.
Length-weight relationship W = a·Lb (a = 0.00891, b = 3.13; 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
—
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.
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.
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:
Your location is saved only on this device and feeds the forecast, the map and the "today" on the home page.
