MS Mega Regina is a cruiseferry owned by Corsica Ferries. She was formerly owned and operated by Viking Line as MS Mariella. She was built by the Wärtsilä Perno shipyard in Turku, Finland and delivered to SF Line in 1985. Her sister ship is the Olympia (now MS SPL Princess Anastasia). Mariella was the world's largest cruiseferry from 1985 until 1989, when the accolade passed on to her Viking Line fleetmate MS Athena. Mariella was sold to Corsica Ferries in 2021 and renamed Mega Regina. The ship started traffic on the Mediterranean Sea in summer 2021. History When the Mariella was delivered in 1985, she was the first ship on Viking Line's Helsinki–Stockholm service which was not owned by Rederi Ab Sally. She has remained on the same route ever since, except for a few brief times when she has been moved temporarily on to other Viking Line routes. This makes her the record holder for the longest continual service on the Helsinki–Stockholm route. At the time of her delivery, the Mariella was the largest ferry in the world in terms of gross tonnage, number of passengers and passenger berths. In 1989, ahead of the delivery of the new MS Cinderella, SF Line considered moving Mariella on to a proposed express Helsinki–Norrköping service aimed at passengers travelling with their cars. The plan never materialised, and Mariella continued to serve on the same route even after the Cinderella was delivered and placed as the third ship on the route. Following the bankruptcy of Rederi AB Slite in 1993, SF Line was left as the sole operator of the Viking Line name, but this had no effect on Mariella'''s traffic.Mariella was the first ship to arrive at the scene of perished MS Estonia in September 1994. Fifteen survivors were picked up from the sea and another eleven were brought on board by helicopters, as Mariella was used as the main helicopter platform. During the 1996 summer season a short cruise from Helsinki to Tallinn was added to Mariella's schedule in place of the nine hours she normally spent in Helsinki. These "picnic cruises" proved to be unpopular and they were not continued the following summer. When the EU ended tax free sales on routes between member states in July 1999, Viking Line added a stop at Mariehamn, Åland to the Helsinki–Stockholm route. As Åland is not a part of the EU tax