Snooty the manatee is turning 65. The charmer for generations of schoolchildren and snowbirds is getting old. It presently weighs approximately 1,020 pounds. It is good for his health but he’s lost muscle tone, and stamina as well. … Sensory processes of manatees are being studied by Gordon Bauer, an experimental psychologist at New College of Florida. According to him, he has been aging and because of this at times he is found sleeping during the experiments.