bring 3d biomes to the oceans so we can have oceanic zones

this seems like an obvious answer to a suggestion people keep bringing up. a lot of people want the minecraft oceans to be improved further with the addition of the abyssal and hadal zones—the deepest parts of earth's oceans where light no longer reaches aka the sea floor and oceanic trenches. with the introduction of 3d biomes allowing for cave biomes beneath the surface and deep dark biomes even further down, this seems like the perfect answer to these suggestions! the ocean floor and trenches could reach down much further than the current sea floor, leaving more space for deep-sea creatures and access to -y levels rich with ores for players brave enough to swim so deep