Find your way to the marina at the St. Thomas Mangrove Lagoon, where you'll meet your stand up paddle instructor. Get a short lesson on this easy sport, or tips on improving your form if you've done SUP before.  Hop on the board, paddle in hand, and follow your guide out of the marina and into the Mangrove Lagoon Wildlife Sanctuary and Marine Reserve. Pass secluded, deserted cays that not many visitors get to see. The way the mangroves grow create tunnels and waterways that make for leisurely, interesting paddling. As you glide over the calm waters, look below you for marine life such as tarpon, upside-down jellyfish, and stingrays. Many species use the protection of the mangrove roots as nurseries for their young. SUP is a simple, accessible sport that anyone can learn, but rest assured that your instructor will be with you the whole way in case you have any issues. At the end of your outing, return to the marina.