User:Chris the Paleontologist/Essexella

Essexella is a scyphozoan jellyfish known from Late Carboniferous fossils. It is one of few fossil organisms that was certainly a jellyfish, and one of the most recurrent organisms in the Mazon Creek fossil beds of Illinois. In the Essex biota of Mazon Creek, it consists of 42% of all fossil finds. Its behavior is speculated to be similar to that of modern-day jellyfish.