The shark has less and less health, she needs to eat to survive. She needs to eat everything: small fish, deep ocean inhabitants, divers and those who came for vacation. Don’t forget that as soon as you are seen (you play as a shark) all alive creatures swim away, so be very attentive.
Avoid mines and jelly fish, the shark doesn’t like them. Some predatory species of fish can reflect the attack, so you need to estimate your strength. Collect all ten sank elements from the bottom of the sea and get extra points. The more shark eats, the bigger and stronger she becomes.
The game also has fishermen which seem to have come from dynamite fishing game, and they throw dynamite at the shark. You can eat them only if you gain good speed. Get more points eating more victims for a short period of time.