You sometime dreamed to appear in depths of ocean and to observe its secrets? This fascinating game will help you to carry out your dream! You should operate special development of scientists - bio-the device, capable to plunge on any depth for search of semi-precious stones. Having mastered rotary motion and change of color, you with ease will cope with a task in view! Remember only, that the bio-device very fragile, and it cannot collide with edges of the screen!