They do not build burrows or other types of homes like otters or beavers. They are very sensitive to changes in water temperature and will move to warmer areas when others become too cold. Manatees are often seen gathered around natural hot springs and power plant pipes which release warm water into rivers and bays. Food and Feeding Manatees are herbivorous, that is they eat plants. They will occasionally eat crustaceans by accident while eating plants.
Water hyacinth is the most important food in many rivers in Florida.
Manatees found in salt water will eat salt water grasses. Scientists have found that captive manatees will eat up to a fourth of their body weight each day. For the larger manatees that could be 300 pounds of plants each day. Manatees do not have tusks like walruses to dig up grasses and other water plants. Using their teeth, manatees rip pieces with their off their favorite plants.