This is because, ironically, this gas that gives people life is lethal when breathed under pressure. This can cause oxygen toxicity and can cause instant death. Scuba tanks are often filled with air, similar to what we breathe on the surface, that are compressed to about 250 bar or 3000 pounds per square inch. Not only that you can learn how to go scuba diving, but you can also enjoy the various marine species found in Costa Rica. Costa Rica is an ideal diving destination because of its warm waters and also because of the diversity of marine life found in this country. Sharks are also abundant in Costa Rica. You can get exciting pictures underwater while diving. - Hawaii Island has diving sites located off the leeward coast which is sheltered from the trade winds by the large glassy mountains with around more than 100ft visibility. The tunnel caverns, arches and lava tubes are excellent venues for picture taking or setting a night dive with Manta Rays or a blue water dive to search for the spotted and bottlenose dolphins, pygmy killer whales, pilot whales and whale sharks. Tilting your head up will prevent water from running into your nose. Scuba mask also comes in different styles and colors. There are the wraparound mask and the low-profile mask. A wraparound mask has two additional panes of glass on its sides to improve peripheral vision. In low-profile mask, it has a notched faceplate and a nose pocket to allow your nose to protrude past the plane of the lens. Your choice will always depend on various factors such as the location of the activity, the water temperatures and the type of stitching that the diver prefers. Here are some of the major considerations for picking a scuba wet suit: Thickness of the material This is the most crucial part of choosing the kind of wetsuit for you. However, you need to be a certified scuba diver in order to let that Grand Cayman dive operators allow you to dive. If you don t have a certification, you can get certified by dive centers operating in Grand Cayman. They have certified instructors that can get you certified in no time. Grand Cayman has a lot of dive sites with different certification requirements.