Blue Holes/Sink Holes+new lighting source block

I think that minecraft should have blue holes. Having a large dark blue hole and swimming thru all the intertwining  tunnels and having a red light source block (that does not stop mobs from spawning.) And close to the bottom many rare ores should spawn(emeralds, Diamonds etc..) They  should also open up randomly and suck in whatever is on top of it, but for the sink holes they just suck the blocks in and throw them around.