If you had to guess, what would you say made those sounds? Did you guess that they were from a blubbery, 10-foot long sea cow, otherwise known as a manatee? If you didn't get it, don't be too hard on yourself. That's what manatees sound like when they're communicating in the warm, shallow waters around Florida. And researchers are starting to learn how to decode this crazy high-pitched chatter. We know that manatees produce vocalizations via the vocal folds in their throat, similar to how humans and other mammals produce noise.