"Self-Defense Academy" (French: "Les Sirènes Contre-Attaquent") is the twenty-eighth episode from season two of Zig & Sharko and the one hundred and sixth episode overall. It was written by Nicolas Le Nevé and storyboarded by Louis Musso.
In this episode, Three mermaids show up on the beach to take self-defense lessons from Sharko. Zig rejoices at the idea of devouring them all! Marina is happy to make new friends, but they're all going to have a rough day.