trilobite
['alligator lizard', 'hen-of-the-woods, hen of the woods, Polyporus frondosus, Grifola frondosa', 'wolf spider, hunting spider', 'slug', 'nematode, nematode worm, roundworm', 'great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias', 'coral reef']