Margaritaville at Sea Islander
- Launched: 2000
- Passengers: 2,114
- Class: Atlantic
The larger and newer addition to the Margaritaville at Sea fleet, the Islander enables the line to offer longer Caribbean itineraries beyond the 2-night Paradise run. Originally built in 2000 as the Costa Atlantica, she was refurbished with the full Margaritaville treatment — multiple signature venues, expanded pool deck, and the line's signature laid-back atmosphere scaled up for a larger audience. At 2,114 passenger capacity, she brings the "Fins Up" experience to cruisers who want a longer escape while keeping the same easygoing Margaritaville spirit.