The Manta Ray is the largest of the rays and roams throughout all tropical waters of the world, typically around coral reefs. We visit Papua New Guinea to check out a special place for Manta Rays. Next we take a look at a couple of special areas of diving: Enriched Air and Ice Diving. Sea World, in Queensland, is Australia's premier marine park, and it has a number of unique aspects that make it a world leader within its field: scientific research and education we learn are key components of its operation. etc.