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Sun Charters owner Dave Douglas says he can make magic out of the waters of the Turks and Caicos Islands, and since 1998, he has been doing exactly that aboard his renovated rum boat, the 77-foot Atabeyra.

Every month, three to five days after a full moon and 50 minutes after sunset, Douglas runs his hugely popular March of the Glow Worms tour, during which the male and female worms perform a phosphorescent mating dance for 10 minutes, turning the waters into a vivid sea of colors.

“It’s the timing of science, but I have never been shut out. We are turning people away because we are cheap and cheerful,” Douglas says.

The laid-back family tradition (his accountant wife, Jenny, handles the money, and his kids pour the endless rum punch and serve snacks) is the perfect occupation for the Bahamas native. He went to school in the U.S., built the boat while in New Orleans and then moved to the Turks and Caicos Islands in 1992 to haul cargo. Six years later, he ditched rum and supplies for charters and glow worms — and the rest is colorful history. Glow Worm/Sunset Cruise, $35, www.suncharters.tc