An ongoing conflict takes place between Zig, a brown hyena, and Sharko, a big shark, who live together on a volcanic island, as Zig wants to eat the mermaid Marina, Sharko's friend.
In the second season, Sharko tries to live and stay away from Zig's endless schemes, while Marina creates a new life away from the bustle of the city and the sorrow of the past.
The third season follows Zig, Sharko, Marina, and Bernie as they embark on an exciting voyage on a luxury ship. They replace the ship's crew as they sail into a storm.