"Synchronized Swimming" (French: "La Natation Synchronisée") is the twenty-first episode from season three of Zig & Sharko and the one hundred and seventy-seventh episode overall. It was written by Boris Guilloteau and storyboarded by Anh-tu Cao.
It first premiered worldwide on August 5, 2019 on the Kividoo online channel in Germany. In France, it premiered on September 4, 2019 on the Gulli channel.
In this episode, Sharko dreams of becoming a synchronized swimmer, but the three dolphins don't allow him on their team, so Marina trains him instead. However, Zig and Bernie constantly disrupt his training by ridiculing him and snatching the mermaid away.
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!
When Bernie laughs at Sharko for the first time, he does so in the same way he did in "LOL Zig" when he sees Zig's video on his phone.
The "Sharko Forbidden" sign from "Bad Hair Day" is seen again when the dolphins kick the shark out of the pool.
The pony that appears flying in the background when Sharko shows his outfit at the beginning of the climax is a recoloring of the horses in "Front Runner".
The climax of this episode is somewhat similar to the one in "Sea, Surf and Fun" in that, in both, water is used as an obstacle to stop Sharko from saving Marina from Zig.