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. Hawaii has a consistent weather condition with few degrees temperature change throughout the year due to year-round warm ocean surface temperature keeping the overlying temperature warm. The warm waters surrounding Hawaii are haven to incredible number of fish, mammal and coral species. There is an approximate thirty percent of common reef fish found in Hawaii due to the archipelago s isolation. With the competition between dive shops, the price for a dive course is down to about between $125 to $150 in any open water course or advanced open water course. Recently, Utila became the home of whale sharks which is the world s largest fish. Don t you worry whale sharks are harmless as you can swim alongside the fish. If you re just a beginner, you should have the basic equipment that include fins, snorkel, mask, and weight belt before moving to professional equipment. Basic Equipment: First, you should have the diving mask so you can see underwater. Your diving mask must be constructed in a way that you can still breathe from the mask. The instructor will also teach you how to control your buoyancy in order to avoid accidentally damaging the corals. The instructor will also teach you about hand signals that are used for communication underwater. He or she will also teach you about the dos and don ts about scuba diving and also about the emergency procedure in case you or your diving buddy encounters a diving accident. This will ensure that you are safe the moment that you jump in the water. You can learn all of these in from scuba diving schools. People of all ages have the privilege to participate in scuba diving. As long as you have the right skills and abilities you will have a room in this recreation. You need to achieve a certain level of fitness if you really want to pursue your goal in scuba diving.