Concept Art: Disgustingly Valuable

Over at ConceptArt.org they have a Creature of the Week (COW) contest. I've never participated, but thought I should give it a shot. The prompt was to design a creature that is disgusting to look at or be around, but has something very valuable about it. In my case, it's the glowing orb tucked in around the exposed rib-like bones of it's back.