The U.S. Navy's special group "Blue Water" builds a half-shark, half-octopus for combat. But the sharktopus escapes and terrorizes the beaches of Puerto Vallarta.
An American scientist up to no good (as usual) by creating the half-pterodactyl, half-barracuda: Pteracuda. When the creature inevitably escapes, it's up to Sharktopus to stop him.
A baby dinoshark evolves into a ferocious predatory adult, terrorising tourists and locals offshore from Puerto Vallarta, Mexico.
