Distant relatives of squid and cuttlefish, nautiluses are an ancient lineage often nicknamed “living fossils” because their shells have appeared in the archaeological record for over 500 million years ...

The chambered, or pearly, nautilus (Nautilus pompilius) is a charismatic cephalopod species known for its exceptional spiraling, chambered shell. It belongs to a family that has barely changed since ...

The rare Allonautilus scrobiculatus (right) swims by a Nautilus pompilius (left). Image Credit: Peter Ward. For several years now, biologist Peter Ward has spent many a night trying to woo nautiluses ...

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A mollusk that is closely related to the squid, cuttlefish and octopus, the chambered nautilus has a cream-colored, spiral-shaped shell adorned with chocolaty-brown stripes. What is intriguing about ...