The Bubble Snail(Bulla Occiddentalis) is a great snail to have for freshening up your sand/mud bed. These snails are omnivores and will hunt tiny organisms like some worms and tiny mollusks. They will also eat cyano and diatoms. They are primarily a nocturnal snail. They will be seen climbing rocks and glass at different times of the day. They are reef safe and a unique addition to your aquarium.