Although manatees usually travel alone, they may gather in groups to migrate, feed, rest or play. Manatees gently nibble, kiss, and embrace each other while playing. Scientists believe that manatees come together to learn where new migration routes and habitats are located. They stretch and use their flippers to scratch any itches they may have and to wipe their mouth clean. Since they have no social hierarchy, they do not work together to defend themselves against enemies.
Manatees are very sensitive to sound.
But they themselves are mostly silent. When they are afraid or aggravated they will give a high-pitched squeal or scream. Scientists believe that some of their calls help the group gather together after fleeing a dangerous situation. The most common vocal dialogue is a mother screaming an alarm to warn her baby of danger and the responding squeals of the baby. Manatees give birth to one baby each year.