This guy he's following is something else; Wallie doesn't know how he can swim like that. Wallie makes a note to ask him about it later, when he has a chance.

There has to be a way to loose that hold on Donna, there must be. A tentacle comes up alongside in the water, and Wallie can still touch bottom, and awkwardly in the water he manages to draw his sword, slash at it until it backs off. His sword is heavy, a liability in the water, but he won't let it sink, either.