Kretorius

The Kretorius swim through the ocean filtering nourishment out of the water. For these creatures, icebergs are a rich source of nutrients. Ingested water passes out through passages all along its body, and its outer surface is so cold an icy coating develops soon after birth. This icy mass both protects and insulates the creature, but because of its high purity the Kretorius have become a commodity. With global warming on the horizon, they're hunted and sold to drought ridden countries.