Calling all aspiring Ariels. The SelkieMermaid School opened this summer at the Edge in Williston, giving swimmers ages 7 and up the chance to don stretchy tails and glide through the water like sirens of the sea. The school — the first of its kind in New England — was created by Ontario native and lifelong swimmer Elaine Fortin, who now lives in Morristown. She told Seven Days recently that she discovered mermaid swimming during a 2008 trip to the Galapagos, where she was inspired by the sea lions she saw there. Introductory sessions are modeled on American Red Cross swim classes, with a lifeguard on hand to supervise. Participants need to have basic swimming skills and bring a comfortable bathing suit, goggles, towel and water bottle. Tails are provided.