Glowing Blocks & Deep Sea Addition

I believe Mojang should add the addition of "Deep Sea" biomes, they could be found in the sea ravines, the biome would would be pitch black, the only source of light would be glowing sea life, plants, and coral, these entities would drop items which could be crafted into a dye that could be used for blocks (i.e. Wool) which would add a glow to the dyed block, the addition of this would add an incentive for players to explore the ocean, besides searching for wrecked ships, it would also add more decorative blocks for players that want to add more light into their builds.