Boss: Gargantuan Masked Fish Gyorg
Gyorg has changed radically from his incarnation on the Nintendo 64, but incredibly his battle has only gotten worse in the fifteen years since. Gyorg has two phases now versus just the one, and the first phase is similar to how he worked in the N64 version. Gyorg will swim around the center platform at the top. Aim for his red fleshy bits with your bow and arrow and he will begin to hop around. You can continue to pelt him with arrows if you can manage. Occasionally, Gyorg will hop on the platform; you have a couple seconds to get out of the way before he charges across the platform and back into the water. Eventually after enough arrow hits Gyorg will spit out his eye, which you should then focus on with arrows. Repeat this process a few times until a cutscene shows and Gyorg knocks down the middle platform. This will change the fight into phase two.
Phase two is very finicky and annoying. The center platform will sink to the bottom, so put on your Zora Mask and sink to the bottom. Gyorg has two main attacks in this phase; he will either suck up water in an effort to chew on your fishy Zora form, or he will release a large amount of small baby fish to irritate you slightly. Also during this time, mines will float up from the bottom of the floor at certain points. To hurt Gyorg, you have to get a mine into his mouth while he is sucking up water; the timing on this is very precise and difficult to get down, so don’t be surprised if you get chomped a few times as you try. For the best results, attack the weak point in the chain on the mine before moving in closely to Gyorg. Your proximity to Gyorg will impact which attack he uses, and the closer you are the more likely he is to suck you up; however, being too close will end up in you getting chomped and the mine getting wasted. Make good use of your Magic Power fast-swimming. After Gyorg eats a mine, he will once again spit out his giant gross eye weak point. Attack that and repeat the process until Gyorg finally gives up the ghost.