Nemo

The Nemo is Doctor Morocco's massive undersea laboratory. Shaped like a massive angler fish, the ship has all the latest stolen technology, including a Chamber of Youth so he can maintain his looks. It also includes a docking bay for the shark submarine which Morocco uses when he's going ashore.

"Double Villainy"
Morocco met with Madeline Pynch aboard the Nemo in order to interest her in a business proposition. As a result of their partnership, Morocco abducted the Rescue Bots and took them to the Nemo where he erased their memories and forced them to go on a mining mission beneath the island. When the Bots accidentally triggered an explosion, the Nemo sustained damage, and Pynch stole it with the intention of heading for Paris.

"Rise of the Heroes"
The damage to the Nemo resulted in Pynch opting to use the escape pod to abandon ship. The sub itself eventually washed up on the shore of Griffin Rock, where the stranded Morocco found it and made use of the Chamber of Youth before he was arrested.

"The Last of Morocco"
Morocco was later forced to trade the Verne device to Pynch in order to get the Nemo back.