For water-sport equipment rentals, Culebra Water Toys (next to El Batey in Dewey, 787/742-1122, cell 787/246-1718 or 787/406-2224, www.islaculebra.com/culebra-water-toys/english.html [1], daily 8 a.m.–5 p.m.) offers snorkel gear for $10, kayaks and pedal boats for $40, rowboats for $50, sailboard gear for $60, and fishing skiffs for $125. It also offers water-taxi service to Culebrita, Cayo Luis Peña, Carlos Rosario, Vieques [2], and St. Thomas [3].
Links:
[1] http://www.islaculebra.com/culebra-water-toys/english.html
[2] http://www.moon.com/destinations/puerto-rico/vieques-and-culebra/vieques
[3] http://www.moon.com/destinations/virgin-islands/st-thomas