It's been raining a bit here recently so the earthworms have been coming up (much to the fascination of my kids and the delight of my chickens). Ignoring the fact this thing appears to be underwater (a guess from the colour scheme, I know nothing about this thing but think the name is cool ) I'm trying to envision the result or method of a prehistoric chicken trying to gobble it up Nice work on the texturing.
This thing is from the Cambrian, before the time of any vertebrate, so no prehistoric chicken would have feed on it! Scientists don't know much about this thing either. At first it was thought to walk on its spikes until somebody envision that the spikes were on the back on the animal.