While on assignment for natgeo, our co-founder Paul Nicklen slipped into the crystal waters of Florida’s Three Sisters Springs where he watched mother manatees grazing in the shallows, calves nursing, and whole groups enjoying the warm waters. Manatees cannot tolerate cold for long. When water drops below about 68°F (20°C), they retreat to springs like these and other sources of warmth. Strict protections help keep the springs some of the few places they can truly rest and escape the cold. But as soon as the ocean waters warm, they spread out again to graze in rivers, bays, and coastal seagrass meadows. Florida’s manatee population is stronger than it has been in centuries, but their future is fragile. Boat strikes, seagrass loss, and the uncertain fate of natural, warm-water refuges all threaten their survival. By slowing down, restoring seagrass, and protecting sanctuaries, we can ensure these gentle giants thrive for generations. Photos by paulnicklen #Manatee #Florida #Explore