This is actually a fish with a complex, heavily-armored skull. The jawless mouth is at the upper tip. The fins shown on this male are primarily for clasping females during copulation. The thing on the far left of this picture is a distant relative of sponges.
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.