Dark Black Goo is a species of Goo found in World of Goo. They have no abilities except to be collected. They are often used as a safeguard for levels that get out of hand. For example, on a level with spikes and no time bugs, these Goos are necessary to prevent the player from getting to the pipe with no Goo balls left. This is not to say that the levels they appear in only require their collection; usually a few extra Goo balls are necessary to complete the level.