Half a manatee's day is spent sleeping in the water, surfacing for air regularly at intervals no greater than 20 minutes. They have a large flexible prehensile upper lip that acts in many ways like a shortened trunk, somewhat similar to an elephant's.
Between February and Octoberthe individuals were observed during day and night times, completing hours of observation. This is one hypothesis that we currently are investigating. These big groups though do occur when several males join a female or two in the hopes of mating with them.
Bottlenose dolphins increase breathing synchrony in response to boat traffic. Compared to many other animals in the world, the manatee lives a very basic and even boring existence.
Early reports of manatees indicated they lived in small groups. Social network analysis of animal behaviour: a promising tool for the study of sociality.