Adding water results in less floury biscuits, larger foam dinosaurs, and slides that won't give a shirtless cousin friction burn. Dress yourself for smooth-moving good times with today's Groupon: for $15, you get $30 worth of swimming gear at Jaws Swim Shop.

Run by a team of avid water-sport enthusiasts, Jaws Swim Shop outfits the aquatically-inclined in wave-ready gear from head to fin. Catering to underwater speed racers and chronic dogpaddlers alike, the shop stocks professional pool gear, including swimsuits ($29+ for women's suits and $20+ for men's) from top brands such as Arena, Speedo, Dolfin, and TYR, as well as Nike drag duds ($44) for those looking to test the finesse of their human fins. Accessorize waterlogged wear with a slew of seafaring extras, including backpacks ($60), Hydro Trainer shoes ($49.99), and TYR swim fins ($29), the perfect gift for feet-regretting former mermaids. Jaws Swim Shop also clenches the necessary duds for snorklers, water aerobics exercisers, and babies dipping in diaper-weary wading pools.