Video: See 300 manatees congregate together In Florida's warm water (1:02)

An estimated 300 mantees swam into Florida's Three Sister Springs in Crystal River. This is the only place in the country were people can legally swim with the mammals, but an acre of the river was shut down for swimming and kayaking because of size of the congregation. Experts say the manatees were using the spring as a warm water shelter.

This story was originally published February 9, 2016 at 1:11 PM with the headline "Video: See 300 manatees congregate together In Florida's warm water (1:02)."