Minecraft's oceans are currently underexplored and lack vibrancy compared to other environments in the game. Enhancements could include expanding underwater terrain with caves and trenches, introducing new life forms such as sharks, penguins, and whales, and adding more flora like colorful coral reefs and a plant similar to Gillyweed that allows temporary underwater breathing. Additionally, the introduction of Prismarine armor made from turtle scutes could improve swim speed and mining efficiency underwater. Luminous creatures like jellyfish could also be added to illuminate hidden areas and resources.