Gossams were a saurian sentient species hailing from the planet Castell. They were a squat people with wrinkled blue skin and long necks sometimes covered with neck rings. They had three-toed feet.

Gossams such as Shu Mai were obsessed with status, power, and wealth. She wore jewellery including neck rings, an emblazoned jewel crest, and a rich skirt made of rare uris silk.