Cayman Kayaks. This outfitter explores Grand Cayman's protected mangrove wetlands, providing an absorbing discussion of indigenous animals (including a mesmerizing stop at a gently pulsing, nonstinging Cassiopeia jellyfish pond) and plants, the effects of hurricanes, and conservation efforts. Even beginners find the tours easy (the guides dub it low-impact aerobics), and the sit-on-top tandem kayaks are stable and comfortable. The Bio Bay tour involves more strenuous paddling, but the underwater light show is magical as millions of bioluminescent microorganisms called dinoflagellates glow like fireflies when disturbed. It runs only on moonless nights and books well in advance. Tours ($39–$59 with some kids' and group discounts) depart from different locations, most from the public access jetty to the left of Rum Point. Rum Point, Grand Cayman, KY1-9006. 345/746–3249; 345/926–4467; www.caymankayaks.com.