08/13/2026
What lives beneath Biscayne Bay?
Dr. Jessica Cardé from FIU’s Marine Ecology Lab is studying how human activity, prey availability, and predation risk shape the way bottlenose dolphins use one of South Florida’s most urban waterways.
To understand dolphin behavior, researchers also need to understand the underwater world dolphins are moving through. That includes the fish and marine life present at different sites, as well as the predator landscape they share with large sharks.
The team is using BRUVs, or baited remote underwater video systems, across Biscayne Bay. For this project, a BRUV is a baited stainless steel frame with a GoPro attached that records marine life below the surface.
So far, the team has placed BRUVs at more than 200 sites across Biscayne Bay, from Haulover Inlet to Barnes Sound. The footage helps researchers document what marine life appears, where it appears, and how activity changes across the bay.
This work is also powered by undergraduate interns, who help review and annotate hours of underwater footage while gaining hands-on experience in marine ecology research.
In a bay shaped by both wildlife and people, research like this helps reveal the hidden connections beneath the surface.