According to the Florida Manatee Sanctuary Act, it is illegal to molest, harass, or disturb manatees.
Many manatee protection organizations, including Save the Manatee, offer a list of things to not do in an area that is known for manatees. These things include entering a designated sanctuary, chasing, disturbing, feeding, riding, touching and surrounding a manatee. Another act that is considered illegal is separating a calf from its mother, which can not only harm the animals but also aggravate the mother. The mother could harm a human in this situation.