The North Sea abounds with many kinds of monstrous fishes which are from a secret hole. None knows the mistical fishes-appearing source. A brave diver would like to explore the deep sea. He chooses a fine day and prepares many kinds of useful explorers for this adventure. He has sixty-minute oxygen to breath after diving into water. In the dangerous sea, there are sharks, octopa and globefishes to attack the divers, so he should use his squirt gun to shoot these fishes quickly before they eat him up. Your mission is to shoot up the monstrous fishes. You have four opportunities. That you do remember is each time of diving into water only have sixty seconds to take up.