Fish and Wildlife Research Institute



FWRI freshwater fisheries biologists utilize various methods to conduct their research, including lab techniques, data analyses and standardized sampling practices.

Electrofishing FAQ

If you spend a lot of time on Florida’s freshwater systems, you may have seen the FWC’s electrofishing boats in action. Biologists use these vessels to gather information about freshwater fishes. These are some of the questions they often receive.

The Science in Developing a Long-term Monitoring Program

FWRI biologists who work on the long-term monitoring program use various methods to ensure their research is as efficient as possible.


Freshwater fisheries biologists calculate condition to observe the overall health of fishes.


Biologists use otiliths to determine the age of fish.

Saltwater fish in the St. Johns River

FWRI biologists encounter many saltwater species along the St. Johns River.

FWC Facts:
Manatees have molars but no front teeth (no incisors or canines). Manatee teeth are unusual among mammals because they are continually replaced throughout the animals' lives.

Learn More at AskFWC