"Then suddenly I saw it. With only a slight churning to mark its rise to the surface, the thing slid into view above the dark waters. "

-H.P. Lovecraft: Dagon-



So, with that out of my system let's start the real comment

It's a, to me at least, very unusual interpretation of Dagon which is exactly the reason why I like this so much

Your Dagon sort of looks like one of the Eldrazi from MTG here and I really like that

I also really like the dimensions of this, Dagon's size, the way it towers over those ships, the way the ships seem completely out of control simply from Dagon surfacing, I think this is a nice way to capture the level of insignifcance mankind is reduced to when faced with one of the monstrous beings in Lovecraft's stories