Yes, it is very common for sharks to be found in lagoons, as these shallow, protected bodies of water provide ideal "nursery" grounds and rich foraging areas. In tropical regions, you will frequently encounter Blacktip Reef Sharks and Whitetip Reef Sharks, which are generally shy and pose little threat to humans. In certain Atlantic estuaries and lagoons, such as Florida's Indian River Lagoon, Bull Sharks are common; they are unique because they can tolerate brackish and even fresh water. While the presence of sharks might seem alarming, most lagoon-dwelling species are small and play a vital role in the high-fidelity health of the ecosystem by keeping prey populations in check. For swimmers and snorkelers in 2026, the risk is statistically very low, though authorities recommend avoiding murky water or swimming at dawn and dusk when sharks are most active. Some tourist lagoons, such as those in Bora Bora or Moorea, even offer supervised "shark feeding" excursions where visitors can observe these apex predators in a controlled environment.