Rise of the Terrans
First encountered on Arion when Marco spotted a hiding baby sand ray. After capturing and slaughtering the baby, it was discovered that cloaks made from baby Sand Ray skin are not only excellent at protecting the wearer from the elements, but also provide camoflage by blending in with surrounding environment.
These relatively docile creatures of Arion are able to burrow through the sand and fly through the air, although it was observed that when their ventral fins are punctured the young at least have a difficult time burrowing (in addition to screeching in pain). Apparently, one of the adults cares for the young sand rays, carrying them in the furls of the adult Rays wings as it burrows
These creatures range in size from about 5 ft across and about 8 inches high for the young to about 20 ft across and about 4 ft high for the adults, although these sizes are representative of only what was observed by the party.