Minecraft oceans are great, but they are so… empty, I feel like it's time that they get some love, like for example a fish mob that the squids attack (would explain where the fish you get with a rod come from) maybe some seaweed/ coral reefs, just something to make it more lively, if there are llamas in the game, the ocean deserves at least a fish or two.

Oh and water breathing/ night vision on beacons would be amazing