Based on the Space Invaders theme, but instead of aliens an assortment of octopi, crabs and starfish. These give 30, 20 and 10 points respectively if you destroy them - but they are out to destroy you too.

With the aid of a speargun and temporary shelter behind sea plants, you must attempt to rid the ocean of these creatures before they overrun you. But if you do succeed in clearing one horde, another takes its place moving at a faster pace until your three lives are used up.

There are five skill levels and a choice of joystick or keyboard control, both equally effective.

High scoring is possible for the skilled player, with the added attraction of a mystery bonus when you spear the stray shark speeding across the top of the screen. On the whole, an entertaining game.

K.W.