RIO GRANDE DE LOIZA AT HWY 183 SAN LORENZO, PR

RIO GRANDE PR USGS

RIO GRANDE DE LOIZA AT HWY 183 SAN LORENZO, PR (50051800) is a real-time streamflow monitoring station on the RIO GRANDE in PR, operated by the U.S. Geological Survey. Riverbot tracks its streamflow and alerts anglers the moment flow and temperature hit their fishing window. 16 fish species are associated with this station in public fish records.

USGS site number: 50051800
Operated by: U.S. Geological Survey
State: PR
Coordinates: 18.1857, -65.9614

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Fish recorded near this station

Community observations nearby

Rio Grande De Loiza At Hwy 183 San Lorenzo, Pr has 16 fish species documented via iNaturalist research-grade observations within 10 km. These community-sourced records indicate fish presence in the vicinity.

Species include: Convict Cichlid (Amatitlania nigrofasciata), Midas Cichlid (Amphilophus citrinellus), Red Devil Cichlid (Amphilophus labiatus), Redbreast Tilapia (Coptodon rendalli), Mountain Mullet (Dajaus monticola), and 11 others.

Convict Cichlid Amatitlania nigrofasciata
Midas Cichlid Amphilophus citrinellus
Red Devil Cichlid Amphilophus labiatus
Redbreast Tilapia Coptodon rendalli
Mountain Mullet Dajaus monticola
Chain Moray Echidna catenata
Squirrelfish Holocentrus adscensionis
Channel Catfish Ictalurus punctatus
Redbreast Sunfish Lepomis auritus
Tilapias Oreochromis
Blue Tilapia Oreochromis aureus non-native
Mozambique Tilapia Oreochromis mossambicus
Mozambique × Nile Tilapia Oreochromis mossambicus × niloticus
Jaguar Guapote Parachromis managuensis
Guppy Poecilia reticulata non-native
Spotted Algae-Eating Goby Sicydium punctatum

2 species above are flagged non-native or potentially invasive (Blue Tilapia, Guppy). Records show what has been observed near this station, not what is native to the watershed.

Where these records come from

Evidence: Community observations nearby; Research-grade community observations (iNaturalist) recorded near this station, not a formal survey.
Records: 16 species; from 41 individual records
Observed: Jun 9, 2019 – Jun 20, 2026; 41 dated records

Sources

iNaturalist research-grade fish observations — 41 records