These invasions reveal cracks in aquatic defenses.

Florida’s waterways have always been busy, but something has shifted. Over the past decade, nonnative catfish have moved from odd sightings to routine catches in canals, rivers, and retention ponds. Anglers in Miami Dade noticed it first, then biologists in Tampa Bay, and now reports stretch deep into central Florida. These fish thrive in warm, altered waters shaped by development and flooding. Once established, they spread quietly, changing food webs before most people realize anything is wrong.



