Orthoceras
Orthoceras did exist. Orthoceras were sea creatures that lived millions of years ago (around 470-360 million years ago) when most of the earth’s surface was covered in water. The name means “straight horn” due to the spear- like shape of their shells. They belonged to a group of creatures called Arthropods and for that long time ago they were quite advanced compared to other living things. Having eyes an early nerve system and jaws they fed on plankton, seal lillies and other smaller Orthoceras! Many fossils of their shells come from North Africa but they come from all sorts of places in the world. They had ink sacs like modern day squids. Sadly, these creatures too became extinct millions of years ago and nobody is sure what caused that to happen. We would not know they had ever existed if it were not for the fossil shells.