Deep Blue

You command an A.N.G.E.L. Fish Attack Sub. Your mission: rid the oceans of the evil aliens in their Undersea Palace deep in the ocean depths. On top of the water, all is calm and beautiful. But as you descend toward the Palace, you won't believe your goggles! Scaled creatures snarl. Swarms of mutant fish attack. Power up! Use the Swirl Cutter! Energy Fin full-throttle ... Fire! Fire! Fire!