SHARK is a turn-based game where you play as a shark. Avoid traps and eat as many swimmers as you can before they can escape to the beach. The swimmers will try to avoid you as they head for the beach; divers will try to catch you. Move your shark with the numeric keypad.
The game lets you configure the number of traps, swimmers, and divers for each playthrough. The recommended settings are 5 traps, 25 swimmers, and 1 or 2 divers. If there are a large number of entities on screen at once, refreshing the playfield each turn becomes uncomfortably slow.