With the entire Magical realm in peril, can the Winx Club succeed on their most challenging quest yet - to attain the power of Sirenix and defeat the evil Tritannus in an undersea battle? With help from the Selkies, their newfound friends, Bloom, Stella, Aisha, Flora, Tecna and Musa take us on a deep-sea thrill ride in this spine-tingling conclusion to Season 5 of Winx Club.
Episodes Comprise: 1. Secret of the Ruby Reef 2. The Gem of Empathy 3. A Magix Christmas 4. Trix Tricks 5. Test of Courage 6. Sirenix