This achievement requires that you get the Shark to be outside of the water for more than 7 seconds. It also has to be in motion as if it stops the level will be failed. This achievement can easily be obtained on Japan Level 6. Your first objective from the start of the level is to use any number of shots to cut the chain holding the green block. Then, launch the Shark at full power into any of the tube openings. Your Shark will get trapped spinning in a figure-eight pattern for a good 10 seconds or more, easily unlocking this achievement.