Expect a chilly but calm snorkel in spring-fed rivers where manatees gather in winter. The water is clear but cold (around 72°F), so you'll wear a wetsuit. Tours typically involve a short boat ride, floating quietly while manatees drift by or occasionally approach. It's more passive observation than swimming with dolphins; the animals move slowly and you must keep distance per regulations. Groups are small, but you're rarely alone in the water. The full experience usually lasts 4–6 hours including travel.
The best time is December through March when hundreds of manatees seek warmer waters. Summer tours still run but you'll see far fewer animals. Expect to pay around $150–$250 per person for a half-day tour with equipment, guide, and hotel pickup from Orlando. Adding lunch pushes it toward the higher end.
Choose a small-group river snorkel over crowded wildlife parks if you want actual in-water time. Skip the “swim-with” marketing that implies playfulness; the rules are strict and the manatees aren't there to entertain you. Bring your own snorkel if you have one that fits well — rental gear is functional but basic.
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