Boating and Sailing in Puerto Rico

Aqua Frenzy Kayaks (At dock area below Calle Flamboyán, Esperanza, Vieques, 00765. 787/741-0913. www.aquafrenzy.com) rents kayaks and arranges kayak tours of Bahía Mosquito and other areas. Reservations for the excursion to glowing Bahía Mosquito cost $30. Make reservations at least 24 hours in advance.

Blue Caribe Kayaks (149 Calle Flamboyán, Esperanza, Vieques, 00765. 787/741-2522. www.bluecaribekayaks.com) offers kayak trips to Bahía Mosquito for about $30, as well as trips to deserted parts of the coast and to nearby islets. You can also rent a kayak and set off on your own.

Island Adventures (Rte. 996, Esperanza, Vieques, 00765. 787/741-0720. www.biobay.com), owned by former schoolteacher Sharon Grasso, will take you to Bahía Mosquito aboard nonpolluting, electrically powered pontoon boats. The best part is leaping into the water, where the outline of your body will be softly illuminated thanks to bioluminescent organisms. The cost is about $30 per person. Percy Rier and Dalberto Arce of Kayaking Puerto Rico (HC 4, Box 12672, Río Grande, 00745. 787/435-1665. www.kayakpuertorico.com) take you on trips that let you explore the coast by kayak, then dip into the water to see what's under the sea.