Lochjaw

You are a diver in an underwater maze. Throughout the maze are valuable
diamonds, and your goal is to retrieve as many as you can. In the middle of
the screen is a shark cage where you begin. As you collect diamonds you need
to bring them back to the shark cage in order to earn points. Swimming back
and forth constantly is a deadly shark. If the shark encounters any of the
diamonds, it will eat them; likewise you can also be eaten by the shark,
causing you to lose a life. You have no defense against the shark, however you
are immune if you are in the shark cage and the doors are closed. Somewhere in
the maze the Loch Ness monster remains hidden. If you disturb the monster, it
will continuously chase you unless you can lead it back into one of the caves
located in the corners of the screen.

Lochjaw