Sailing around the world is much easier when you learn which knots are edible and why dolphins aren’t marriage material. Learn the basics with today’s Groupon at Adventures in Paradise. Choose between the following options:

• For $9, you get one child’s ticket for a sunset dolphin cruise (a $19 value).
• For $24, you get two adult tickets for a sunset dolphin cruise (a $50 value).<p>

Founded in 1986 by married maritime enthusiasts Craig and Evelyn Stewart, Adventures in Paradise escorts customers on sightseeing expeditions around the Sanibel and Captiva islands. As 90-minute dolphin cruises set sail, voyagers can catch sight of dolphins playing in the wake, manatees lounging in the waves, birds en route to evening roosts, and sea turtles training for triathlons against arrogant hares. Knowledgeable captains and naturalist first mates narrate each journey, enlightening patrons about the Mangrove Islands and Calusa Indians and the aquatic critters that populate the diverse ecosystem. Throughout the entire excursion, participants can hydrate themselves with a bounty of complementary water and soft drinks while a soundtrack of tropical music and orcas covering Jimmy Buffet classics scores their escapade.