User blog comment:Darkcloud1111/Official "The Sea of Monsters (movie)" Discussion/@comment-15843945-20130427073325/@comment-3146930-20130428174013

Looking at the trailer, Percy, Annabeth, and Tyson are all in a raft about to enter the Sea of Monsters. In the book however, they were with Clarisse until the submarine exploded, with Tyson becoming lost. It is possible that in the movie version, they try and stop Clarisse like they did in the book, but unlike the book she sicks her undead Navy officers on her. That is all I can think of.