Nautilus

The nautilus was a type of aquatic mollusk native to Earth.
When Spock tried to match the sound of the Whale Probe to the sound of an Earth animal in the phylum search mode aboard the Klingon Bird-of-Prey , a nautilus was one of the animals shown. ()
For some time, Captain Jean-Luc Picard kept a nautilus shell in his ready room aboard the . (). The nautilus shell was not seen in Picard's ready room after the Battle of Wolf 359. () 
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Category:Earth animals