New biome in deep caves

I think it would be nice to have a new biome called the underground village where you can find new armor like deep center armor that has luminous moss on top of it and the villagers have a new skin and wear that looks like they have been swimming a lot and that they have wear with moss and have a turtle shell they go fishing socialize with dolphins and nautilus they use tridents as a weapon and in that village mobs can’t spawn and the village has luminous animal and plants with a little of sunshine light coming through the cave the cave has a nice lake with a big a trance to the ocean with a working conduct.