Summary ²

The chambered nautilus, Nautilus pompilius, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top. This is to help avoid predators, because when seen from above, it blends in with the darkness of the sea, and when seen from below, it blends...

Sources and Credits

1. (c) Hans Hillewaert, some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:Nautilus_pompilius_3.jpg
2. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Nautilus_pompilius

More Info

• iNat taxon page
• Animal Diversity Web
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• California Academy of Sciences
• FishSource
• Global Biodiversity Information Facility (GBIF)
• iNaturalist Cephalopod Working Group
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• 日本のレッドデータ検索システム

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