Cholisters are giant mussels native to the oceans of the water-world of Buzzell. The giant bi-valves produced Soostones, rare precious pearl-like gems, sought throughout the galaxies for their beauty and luster. During the time of The Scattering, Phibians, half-men/half-fish creatures were bred to more efficiently harvest the deep underwater gems, by cutting open the shellfish to reveal the stones inside.