Abyscidis were dog-sized crustaceans that lived in the shadows of the larger flesh eaters of the dark. Primarily scavengers, they were unparticular feeders, taking any organic matter they could scavenge, dead or dying. The chunky invertebrates cluster in loose colonies at the base of a pit or in deep caves. The nymphs, hatching in large numbers, use the rivers of organic slop to migrate around their dark domain, locating an unclaimed section of cave or chasm shoreline to mature in and establish 