(4) and (3) are worms that drag their heavy, ornamented, back ends around. (2) may be a finned version of this kind of worm, although my original plan for it was that the bulb was the front end. Number (1) is just pretty.
Reader challenge: What function to the rear ornaments serve?
Hello, my name is Dan. I am an author, artist, explorer, and contemplator of subjects large and small. I like bacon. I like pizza. I like bacon pizza. I enjoy long walks on the beach, but prefer the mountains. I am a huge fan of Jesus. When I grow up, I want to be just like him and create my own universes.