This specimen shows a fossilized shrimp and two fossilized fish. The fish"s fins and bone structure have been well preserved. Shrimp belong to the phylum Arthropoda. The oldest known fossil comes from the Jurassic Period (206 to 144 million years ago). These fossils show us that shrimp have not changed in hundreds of millions of years and that they did not pass through any intermediate stages of development. In other words, they did not evolve, but were created.