Chambered Nautilusオウムガイ

Nautilus pompiliusVU— Vulnerable

The chambered nautilus is a living fossil-like cephalopod that has changed little in hundreds of millions of years, drifting through deep Pacific waters in a coiled, gas-filled shell whose chambers keep it precisely buoyant — a shell so pressure-sensitive it implodes below about 800 m.

Chambered Nautilus (reference photo)
Photo: Diego Tirira / CC BY-SA 2.0 / Source / cropped

Species Data

Classification
Nautilida / Nautilidae Source
Distribution
Found in the South Pacific and waters around Australia at depths of roughly 200-600 m; beyond about 800 m the shell can no longer withstand the water pressure and implodes. Source

Did You Know?

  • The English name "Nautilus" derives from the Greek word for "sailor" or "ship." Source
  • In ancient China, nautilus shells were fashioned into drinking cups known as "parrot cups." Source

Where to See This Species

5 facilities · 0 individuals

すさみ町立エビとカニの水族館 (Susami Chouritsu Ebitokanino Suizokukan)Wakayama

すさみ町立エビとカニの水族館のWikipedia記事に飼育種として記載 Source

ふくしま海洋科学館 (Fukushimakaiyoukagakukan)FukushimaOpened in 2000

ふくしま海洋科学館のWikipedia記事に飼育種として記載 Source

京都水族館 (Kyouto Suizokukan)KyotoJR「京都」駅中央口から徒歩約15分。

京都水族館のWikipedia記事に飼育種として記載 Source

志摩マリンランド (Shimamarin Land)MieOpened in 1970

志摩マリンランドのWikipedia記事に飼育種として記載 Source

Toba AquariumMieOpened in 1955

鳥羽水族館のWikipedia記事に飼育種として記載 Source

Latest news

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Conservation Story

Conservation Status

IUCNではVUです。成長が遅く、殻を目的とした採集の影響を受けやすい種です。

Habitat

インド太平洋のサンゴ礁外縁から大陸棚斜面。

Threats

  • 観賞用の殻の採集
  • 生息地の劣化
  • 個体群回復の遅さ

Conservation & Breeding Efforts

  • 国際取引の管理
  • 飼育・繁殖研究
  • 保全教育

Sources

en.wikipedia.org

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FAQ

How deep does the chambered nautilus live?
It typically lives at depths of about 200-600 m; if it descends past roughly 800 m, water pressure will crush its shell. Source
What does a chambered nautilus eat?
It scavenges on dead fish, crustacean molts, and other carrion, since it cannot swim fast enough to actively hunt live prey the way octopuses and squid do. Source
How long do chambered nautiluses live?
They are thought to live roughly 10-20 years, unusually long for a cephalopod. Source

Source: ja.wikipedia.org en.wikipedia.org