Sharko is a shark and the one of four main characters of the series. He is Marina's boyfriend and protects her from being eaten by Zig. Sharko is quite strong and would do anything for Marina, giving a big thrashing to whoever tries to harm her or himself .He'll do whatever Marina asks to make her happy, even if it means doing something he doesn't like or finds unsafe. He seems to like table-tennis very much.
- Marina (Zig & Sharko)
- Zig (Zig & Sharko) (Episodes In few a times as Protagonist)
- Bernie (Zig & Sharko) (Sometimes)