Peter is ready to tell Stiles to just keep the hell away, but the boy moves before he can say anything. Peter once again shifts his attention to Stiles, smelling his excitement, and getting a handful of talons raking through his chest. A creature near death is the most dangerous after all, Peter also knows that. He roars, biting into the mermaid while his hand fishes for his own knife to drive it deep into the creature. His claws wouldn't kill the thing fast enough.

He hears flesh being torn and ripped nearby too as the bitter, salty tasting blood floods his mouth. It's already dead, but his wolf won't let it go, it wants revenge. His red eyes turn toward Stiles, soaking wet from water and blood and Peter once again is glad humans has worse smelling than wolves. He may be a bit embarrassed then, because this is not an appropriate time and place for what his wolf wants to do...

The destruction makes the others stay in the water or escape through an underwater cave. Even if Peter almost thinks they could take them on...

"Cut everything you can and let's leave." he orders.