Ortheceras Fossil

Orthoceras were an early relative of the Ammonite and a member of the Nautiloid family. Later varieties became coiled for buoyancy unlike the straight shell of the Orthoceras which sunk more easily. Orthoceras fossils are around 395 million years old and found in Morocco.
Orthoceras are the fossilised remains of a nautiloid cephalopod, Squids are a living form of Cephalopods. These fossils are found all around the world usually deposited in limestone rocks.