The ocean liner makes a stop off a magnificent desert island. When Sharko turns the beautiful beach into a garbage dump, Marina orders him to clean it up. Of course, Zig and Bernie turn his task into a nightmare to keep the shark busy.

Marina dreams of sailing the sea, so Zig asks Bernie to build a cruise ship where all her friends can hop aboard! However, all awhile, Sharko believes this cruise vacation is another one of Zig's traps. When the boat is taking a dangerous course, Zig and Sharko are too busy bickering as always to save the day… who will come to the rescue?

A famous actor of which Sharko and Marina are fans comes to stay on the boat. When Zig discovers that the star is wearing a mask that makes him beautiful and strong, he intends to use it to attract and eat the mermaid...

Marina replaces the ship's nurse for the day, so Zig pretends to be hurt to be alone with her in the infirmary, but Sharko is not fooled and does the same thing.

Zig sends Marina and Sharko on a fake treasure hunt in order to catch the mermaid, but they end up discovering a real abandoned galleon with cursed treasure inside.

Zig dresses up as a cute baby so that Marina takes care of him. But the mermaid is too busy and asks Sharko to babysit Zig! The shark develops strong paternal feelings towards the kid and is heartbroken when he finds out his true identity.

When a huge thunderstorm forces everyone to go inside the ship, Zig takes advantage of Sharko's seasickness to catch Marina whenever she has to save passengers that got stuck outside.

Olga-the-terrible, a Viking chieftain has fallen head over heels in love with Zig. He is quite happy to have her shield him against Sharko, but not so happy with the fact that she keeps him away from Marina who Olga sees as a rival…

When the emergency alarm rings by mistake, everyone panics! Sharko decides to organize safety training to protect everyone in case of an emergency. But Marina isn’t a very serious student, and Zig sabotages the classes to seize the mermaid.

The baby swordfish starts idolizing Sharko to the point of repeating his every move, much to the shark's embarrassment.

When the ship sinks underwater, Sharko tries to take the opportunity to kill some nostalgic memories of swimming in the ocean, but Marina forces him to help her fix the boat instead.

Zig tries to eat Marina at night while she's sleeping, so Sharko must save her without making too much noise, as she gets extremely angry when woken up.

Sharko must stop Marina from being lured into Zig's stomach during a game of blind man's buff.

After accidentally tossing Sharko's fertilizer in the ocean, Marina creates a new one that makes all the plants in his garden grow huge. However, when Bernie's small carnivorous plant drinks an entire bottle of the substance, it turns into a giant monster.

After a high-speed chase across the ship, Zig and Sharko get stuck inside the kitchen’s cold room. The shark and the hyena will soon have to forget their differences and combine forces to find a way out of this tricky situation...

After the ship crashes into an iceberg, Marina decides to explore it and befriends a penguin living there. However, once the ship is repaired, the creepy little bird refuses to let her or Sharko leave.

Zig, Bernie, Sharko and Marina land in a labyrinth of corridors and pipes in the engine room. While Sharko tries to find the exit, Zig tries to grab Marina every time he is not looking.

Marina gets a piece of parsley stuck in-between her teeth, but she does not notice it, even after Sharko tries to explain it to her. This causes the shark and the other cruisers to run away from her in disgust, except for Zig, who takes advantage of the situation in order to eat her.

Marina and Sharko are playing hide and seek, but the mermaid is not very good at hiding. However, she eventually finds a spot so good that neither the shark or Zig can find her, no matter how hard they look.

Rats invade the boat! Marina tries to get rid of them and Sharko would like to help, but he is terrified by the rodents… Zig and Bernie will use his weakness to their advantage. Will Sharko be able to overcome his phobia to save Marina?

Sharko can’t stand gags and pranks, so Marina teams up with Zig and Bernie to loosen him up. But they take advantage and double-up their gags to overpower the shark. Is Sharko the only one who doesn’t have a sense of humor?

Sharko has a secret passion for synchronized swimming! Marina decides to make him the star of the swimming pool. Zig finds him absolutely ridiculous… and is very pleased to discover that mockery can be a powerful weapon against the shark!

Sharko's romantic dinner with Marina keeps getting interrupted by Bernie and Zig's constant attempts to smudge his fancy suit.

Sharko is happy to be reunited with two old friends from his teenage years, but Marina isn't very fond of their rebellious ways.

Hades visits the ship in order to finally get a kiss from Marina, but she could be more horrified of him.