Manatee County, Fla. — Inmates at the Manatee County jail raise thousands of fish in large tanks through an Aquaculture program.
Once the fish are large enough they are used to feed the inmate population.
When the temperatures drop, workers have to keep the water warm in order to keep the estimated 30,000 tilapia alive.
Lia Fernandez, a reporter at WTSP in Tampa, shared a video of the process on twitter.
The fish can not survive in water cooler than 55 degrees.