TIL: Nautilus is Still Alive

Nautilidae, both extant and extinct, are characterized by involute or more or less convolute shells that are generally smooth, with compressed or depressed whorl sections, straight to sinuous sutures, and a tubular, generally central siphuncle. Having survived relatively unchanged for hundreds of millions of years, nautiluses represent the only living members of the subclass Nautiloidea, and are often considered "living fossils".

The associated Greek word means 'sailor'

They're still alive! The pressure-resistant shells enabled them to survive at a depth of 800 meters.

https://www.wikiwand.com/en/Nautilus

They're being collected for decoration and other purposes

https://www.wikiwand.com/en/Nautilus#Conservation_status_and_human_use

They're indeed beautiful.