Nautilus Shell: CLEN-2882 Nautili have existed on Earth for around 500 million years in the depths of the ocean, appearing long before the dinosaurs roamed the Earth, and their appearance has barely evolved in over 150 million years. A Nautilus is a type of mollusk called a cephalopod, a cousin of squid and octopi. The Nautili’s tentacles are unique because they can have between 50 to 90 different arms that have ridges and grooves that are easier for gripping, as opposed to the suckers on an oct