Occulta

The Occulta is a pirate ship introduced in Season 6 where the Pirate Zombies used to sail the seven seas, found on Calavera island.

Overview
It is a pirate ship where Pirate Zombies used to rule the seven seas for one hundred years, found on Calavera Island. Although it had sunk with the pirates for centuries, it was said to have the ability to materialize with the passengers when the fog rolls in. This is where the Fantasy Emerald, a piece of the Legendarium Key, can be found.

Season 6
In "Mystery of Calavera," the Winx meet the Trix in the Legendarium World, when the fog rolled in onto the Occulta ship and the Pirate Zombies arrived.

In "Zombie Invasion," the Winx continue their battle with the Trix and Pirate Zombies, but the Winx manage to return to the real world with the Fantasy Emerald. Later, Selina sends the ship to Calavera island in the real word to attack the Winx and retrieve the emerald. Ultimately, the Winx are victorious over the pirates.

Trivia

 * It's name is derived from the word "occult".
 * This is the only place in the Legendarium World which is seen in both 2D and 3D.