Marina, who feels that theres just too much injustice going unchecked on the island, declares that Sharko will be the new local police officer. The shark takes his . Zig and Bernie discover a submarine that has washed up on the island. A little paint job and bingo, they have disguised the submarine as a…big fish. The ideal . A cargo ship runs aground on the beach, its hold loaded with toys. Zig will turn them into inventions so he can get his mermaid : a spinning top becomes a . Another mermaid suddenly shows up in the lagoon. Marina is none too happy about this intruder. Sharko gets all confused, he doesnt know which is which and .