Manatees are related to elephants - which surprises most people because elephants live on land and look so different! Scientists who study their DNA and skeletons have found they share a common ancestor millions of years ago. Like all mammals, manatees breathe air and must come to the surface every few minutes to take a breath.
They are extremely slow-moving and completely harmless. Manatees have no natural predators in the water - their biggest danger comes from boat propellers, which is why Belize has special 'go-slow' zones in areas where manatees are known to swim. In these zones, boat speeds are kept very low to keep the manatees safe.
Belize has a healthy population of Antillean manatees - a type found in the Caribbean. They like the shallow, warm water around the reef and in river mouths where sea grass grows. The Swallow Caye Wildlife Sanctuary near Belize City is a famous spot where snorkellers can swim alongside them.
Manatees are curious animals and will sometimes swim right up to snorkellers and allow themselves to be gently observed. Their wrinkled grey faces and small, bristly lips make them look rather ancient and wise. Many people say swimming alongside a manatee is one of the most unforgettable experiences of their life.