Sea Monsters that spawn in the ocean -- 2

I need talented freelancers to bring an underwater fantasy world to life. Specifically, I'm looking for multiple sea monsters to inhabit the ocean -- a mystical creature of my choice. These monsters will be part of a game, so a keen attention to detail is essential for capturing the perfect atmosphere and bringing these beasts to life. I'm envisioning big and impressive creatures that will evoke awe in all who see them. Different Ocean biomes of the game will require different types of monsters, so I look forward to seeing your ideas!