Polychaete Worm: Ottoia

In the group shot, Ottoia is shown in the lower right hand corner. On the left is an artist's rendition of the worm when it was alive.

Notably, the animal was able to evert both its mouth parts and anus, probably to attract and capture prey.

Image: Painting by Kam Mak, National Geographic, October, 1993
Detail of painting by D.W. Miller from American Scientist, March-April, 1997. Labels added