While alligators and sharks typically occupy different environments—freshwater and saltwater, respectively—they do occasionally "swim together" in brackish estuaries and coastal marshes. In 2026, marine biologists have documented an increasing number of interactions between American Alligators and species like Bull Sharks, which are unique for their ability to tolerate freshwater for long periods. These encounters most frequently occur in the Florida Everglades and the coastal inlets of the Southeast U.S. These interactions are rarely "friendly"; they are usually competitive or predatory. Research has shown that alligators are opportunistic predators that will occasionally prey on small sharks, such as bonnetheads or lemon sharks, when they venture too far into coastal creeks. Conversely, large sharks have been known to attack alligators in deeper tidal waters. While they don't "school" together, they do inhabit the same overlapping "eco-tone" where the river meets the sea. For 2026 travelers kayaking in coastal Florida, it is a rare but scientifically proven possibility to see both apex predators in the same body of water, though the alligators usually stick to the shallow, fresher margins while sharks remain in the deeper, saltier channels.