The programming this year "offered workshops on underwater modeling and breath-holding; a swim with Hannah Fraser, a professional mermaid and environmental activist; and a 'Twenty-Thousand Leagues Under the Sea'-themed ball," describes Drooker. Meanwhile, "poolside vendors sold mermaid paraphernalia, including tails, which cost $80 for one made of fabric and between $2700 and $4000 for a custom-fitted fluke made of silicone, whose skin-like feel and neutral buoyancy make it the preferred material of discerning divas of the deep.