Scuba divers communicate back to ship through tugs on their dive line, with one pull meaning "Lower me farther" and two signaling, "This squid won't stop flirting with me." Learn the language of the sea with today's Groupon to Squalo Divers in North Miami Beach. Choose between the following options:

• For $29, you get a Discovery scuba-diving class (a $75 value).
• For $69, you get a Discovery scuba-diving class and two ocean dives (a $195 value).
  
  

A PADI Five-Star Dive Center, Squalo Divers facilitates underwater pursuits with a heated on-site dive pool and a slew of training and certification courses. The Discover Scuba Diving session sets off Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday mornings and aims to enlighten the dive-curious to the undersea sport. An instructor first shares scuba fundamentals, equipment, and his favorite flounder recipes using simple language so that even the youngest participants can easily follow along. Next, students take to the warm waters of the pool, where the masked master demonstrates a short series of simple skills for all to practice. For the remainder of the session, the teacher supervises while fledgling divers swim solo, putting their newfound nautical knowledge into practice and even taking underwater photos of friends, fellow divers, and the occasional snorkel model.

Those who opt to add on a duo of ocean dives then spend the afternoon postpool-exploring one of Squalo Divers' 50 dive sites. For both sessions, the center stocks scuba-specific supplies for each class, including masks, fins, and manatee saddles, and asks that each student bring his or her own towel and swimsuit. For divers hooked to the sport after an introductory lesson, Squalo Divers also offers certification courses as well as day and night dive trips for advancing aquanauts.