South Branch Raritan River at South Branch NJ
South Branch Raritan River NJ USGS
South Branch Raritan River at South Branch NJ (01398102) is a real-time river monitoring station on the South Branch Raritan River in NJ, operated by the U.S. Geological Survey. Riverbot tracks its river conditions, including water level and keeps recent, datum-labelled water-level history for anglers. 38 fish species are associated with this station in public fish records.
- USGS site number
- 01398102
- Operated by
- U.S. Geological Survey
- State
- NJ
- Coordinates
- 40.5469, -74.6964
Live conditions & history
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Fish recorded near this station
Community observations nearbySouth Branch Raritan River At South Branch Nj has 38 fish species documented via iNaturalist research-grade observations within 10 km. These community-sourced records indicate fish presence in the vicinity.
Species include: Rock Bass (Ambloplites rupestris), Yellow Bullhead (Ameiurus natalis), American Eel (Anguilla rostrata), Goldfish (Carassius auratus), White Sucker (Catostomus commersonii), and 33 others.
- Rock Bass Ambloplites rupestris
- Yellow Bullhead Ameiurus natalis
- American Eel Anguilla rostrata
- Goldfish Carassius auratus non-native
- White Sucker Catostomus commersonii
- Satinfin Shiner Cyprinella analostana
- Spotfin Shiner Cyprinella spiloptera
- European Carp Cyprinus carpio non-native
- American Gizzard Shad Dorosoma cepedianum
- Eastern Creek Chubsucker Erimyzon oblongus
- Northern Tessellated Darter Etheostoma olmstedi
- Banded Killifish Fundulus diaphanus
- Eastern Banded Killifish Fundulus diaphanus diaphanus
- Western Mosquitofish Gambusia affinis
- Spottail Shiner Hudsonius hudsonius
- Redbreast Sunfish Lepomis auritus
- Green Sunfish Lepomis cyanellus
- Pumpkinseed Lepomis gibbosus
- Pumpkinseed × Green Sunfish Lepomis gibbosus × cyanellus
- Bluegill Lepomis macrochirus
- Northern Bluegill Lepomis macrochirus macrochirus
- Common Shiner Luxilus cornutus
- Smallmouth Bass Micropterus dolomieu
- Largemouth Bass Micropterus nigricans
- Swallowtail Shiner Miniellus procne
- Oriental Weatherfish Misgurnus anguillicaudatus
- Bridle Shiner Notropis bifrenatus
- Margined Madtom Noturus insignis
- Rainbow Trout Oncorhynchus mykiss
- Shield Darter Percina peltata
- Fathead Minnow Pimephales promelas
- White Crappie Pomoxis annularis
- Black Crappie Pomoxis nigromaculatus
- Flathead Catfish Pylodictis olivaris
- Eastern Blacknose Dace Rhinichthys atratulus
- Longnose Dace Rhinichthys cataractae
- Brook Trout Salvelinus fontinalis
- Creek Chub Semotilus atromaculatus
2 species above are flagged non-native or potentially invasive (Goldfish, European Carp). 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
- 38 species
- from 200 individual records
- Observed
- May 18, 2024 – Aug 14, 2026
- 200 dated records
Sources
- iNaturalist research-grade fish observations — 200 records
🪰 Hatch Calendar
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A month-by-month hatch calendar for this river — which insects are emerging now, hook sizes, and patterns to fish — collected from fly shops and guides who know it.