Nature lovers in Miami Lakes have been delighted by seeing manatees in three lakes in the northern section of town, and have posted photos of the sea cows on social media. But the peaceful, slow-moving vegetarians that swim in Loch Doon, Loch Ness and Lake Ruth are vulnerable to mariners who are speeding, Councilman Luis Collazo said. In a memo to the town council, Collazo wrote that the waterways are “the only lake system in the town...