Bakunawa

A boss kinda like the Ender Dragon except you have to fight it under water with air bubbles showing up to let you breathe.To stop it from healing you will have to take out all seven moon crystals.If you defeat it then you get a dragon horn, which can used to scare mobs away.To get to the boss you will have to craft eyes of liquid, which can be crafted with a pearl and heart of the sea.Following it will lead you deep in the ocean to a bubbly portal that leads to Bakunawa.I want to see this added because I think this would be a great boss to add to the game and give it even more of a challenge.