Orthoceras fossil sculpture. An extinct "straight-shelled" cephalopod.

Orthoceras fossil sculpture. An extinct "straight-shelled" cephalopod that lived around 370 million years ago during the Upper Devonian period. All questions are welcome. Great condition no chips or cracks. Thanks for visiting. Ancient Cephalopod: It is an ancestor of the modern-day squid and a relative of the chambered nautilus. Appearance: Characterized by a long, straight, conical shell, resembling a "straight horn". Shells could be smooth or ribbed. Size: They varied in size, ranging from a centimeter to over 14 feet long. Habitat and Lifestyle: They lived inside their shells, used tentacles to grab food, and moved using jet propulsion by squirting water.  Diet: They were hunters, eating plankton and larger bottom-feeding animals like trilobites.  Geographic Location: Commonly found in Morocco, Scandinavia, Sweden, and the Baltic states. The rock containing them is often polished for decorative purposes.