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 .brZig 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 .brA 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 .brAnother 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 .