Many people come to Little Corn to get their Open Water certification ($305). It's hard to think of a more pleasant environment to do this. The waters around also have a spectacular array of fish life. You'll almost certainly see nurse sharks and barracudas, and Caribbean reef sharks and eagle rays are also often spotted. Dolphins and hammerhead sharks are occasionally seen. Diving is generally quite shallow, and most of the best sites only go down to around 55 feet (17 meters). This can be a good thing, since the nearest decompression chamber is 3-4 hours away by panga. This is also one of the reasons why dive shops here generally only do one-tank dives, costing around $35. Both offer discounts if you buy a package.
August, September and early October are generally the best months to dive, with better visibility and less current.
Diving, Diving Info., Diving School