ROME -- The Italian owners of the Costa Concordia ship that capsized off the Tuscan coast are considering six bids to salvage the vessel, all of which envision a 10-12 month operation.

Costa Crociere SpA said in a statement Friday that each plan focuses on ensuring the least environmental impact around the island of Giglio, which is in a marine sanctuary.

The Concordia ran aground Jan. 13 after the captain veered off course in an apparent stunt.

Twenty-five people were killed and seven others are missing and presumed dead.

Costa didn't say whether the plans envisaged refloating the ship or breaking it up into pieces.

The winning bid is expected to be announced later this month or next.