The Underwave: a beautiful bioluminescent underwater biome.

The Underwave would be a large underwater biome. You find it by going through trenches in the ocean down to deepslate level. down here it's beautiful. luminent stone lines the walls painting a starry image in the massive pocket of unique life. the structure of the biome is a large pocket instead of winding caves. it would have many unique fish that are bioluminescent and the whole cave's bioluminescent is powered by depth berries. the glow berries of the sea. this biome is beautiful blue, pink, and green, dots shining on the walls. some reasons you would come here is to collect cool stone types, a new underwater plant, and build a base in the most beautiful (if not terrifying) biome of all. also only custom fish and sea creatures would spawn here. no outside fish or drowns or zombie things or anything like that, just the things that fit the fish and sea creature atmosphere. The (original) main reason you were to come here is to get cool mobs/resources and build awsome aquariums. but, mobs,items, and structures (which would be non-existant it's an untouched place) are unrelated and ignored here.