. >> in our fast forward segment being loved to death, florida's manflorida's manatees, many want to touch the gentle sea cow. but sheila macvicar says there's much to fear. too much of a good thing. >> king's bay is the only place you can swim with and even touch groups of florida's endangered manatees. producing an an aquatic gridlock. an ever growing number of people now more than 250,000 a year flock to this small bay. hot springs beneath the bay provide warm water all year round, heated to a pleasant 72°. manatees need that warmth to survive winter cold. it's critical manatee habitat. >> we have fat healthy manatees here. >> mike is a skilled guide. the swim with manatees attraction is his livelihood. often swimmers will touch or pet the manatees. which is legal here. they believe new york hers and boats are harming the manatees. they believe at the least, touching should be banned. turns tourists to manatee advocates. >> gives me chills thinking about that, being able to touch something that to me which has always been so elusive. >> so different than anything i've ever done. l