Season 5

The fifth season of Winx Club premiered on Nickelodeon in the United States on 26 August 2012 and on Rai 2 in Italy on 16 October 2012. It is the first season produced with Nickelodeon.

It is the first full season in the Winx Club revival series, following the 2011 specials that summarized seasons 1–2 of the original show.

In this season, the Winx face a threat underwater and will have to face a new dreadful villain, Tritannus. He was a normal triton who was mutated into a powerful demon caused by pollution. His main goal is to become the emperor of the Infinite Ocean. He allies with the Trix and the leader, Icy, falls in love with him. The Believix power is not strong enough underwater, so the Winx start a challenging quest to get the ancient Sirenix power and become ocean fairies.