In addition temporary mating herds develop when a female is in estrus. Manatees use their tail to propel themselves forward and are surprisingly agile in the water. They are capable of complex maneuvering including somersaults, rolls, and swimming upside-down. They are active day and night, resting for several hours at a time near the surface of the water or at the bottom. While resting on the bottom, they rise to the surface to breath every few minutes.
Manatees use various forms of communication in the water.
Individuals rub themselves against hard surfaces, possibly secreting a scent to convey information about the reproductive state of the resident females. Manatees also have an acute ability to hear and squeals are often used to keep contact between a mother and calf. Vision seems to be the preferred method of navigation. They can be found in shallow rivers, canals, saltwater bays, estuaries and coastal areas. Because of their extremely low metabolic rate and absence of a thick layer of insulating body fat, they are restricted to tropical and subtropical waters.