Scuba divers train extensively to prepare for encounters with common undersea hazards, such as rip tides, shooting star fish, and outbreaks of crustacean-led song-and-dance numbers. Practice aquatic harmonizing with today's Groupon: for $25, you get one Try Scuba or Scuba Skills Update class from Aqua Visions Scuba Ltd. in Mamaroneck (a $50 value).

Aqua Visions Scuba's experienced staff imparts fundamentals to beginner divers and refreshes experienced ocean explorers' techniques in a safe, controlled environment. Both the Try Scuba and Scuba Skills Update courses bestow below-sea-level confidence in a training pool free of jellyfish and dander-ridden sharks. The Try Scuba lesson introduces landlubbers unfamiliar with diving to scuba equipment, safety practices, and basic techniques. Certified depth seekers can use instructor guidance in the Scuba Skills Update class to reacquaint themselves with wetsuits, calibrate their flipper propulsion, and fine-tune complex octopus high-five procedures.

All students must fill out medical questionnaires before doing any toe dipping. Aqua Visions Scuba provides all diving equipment for lessons, which take place Mondays from 7:30 p.m. to 10 p.m. Divers will need to meet at the store sometime prior to their lesson for fitting and gear, and they will then be responsible for their own transportation to the Rye YMCA for their session.