St George hitting Nautilus with an anchor, Nautilus pinning St George

St. George swung the anchor up and struck the merman across the face with it, smashing him to the deck.
Nautilus rolled, spat out some blood and a triangular tooth, and threw himself at St. George. The shell shoulder plates slammed into the hero’s chest, and the impact flung them both down the length of the ship. They landed on an ex and crushed its hips to gravel. The merman twisted around and pinned St. George to the deck.

Excerpt From Ex-Isle, pg 638
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017