Nautilus in Black and White—The interior of the nautilus shell is roughly logarithmic. Each nautilus shell maintains the same proportions in the spiral throughout the lifetime of the cephalopod that creates the chambers within the shell.
In the wild, no scientist has ever documented a nautilus from hatching to maturity. So a great deal is unknown about these wondrous animals.
What is known is that they can live for 15 to 20 years and reach maturity when they are about 12 years old. Nautilus eggs are huge and are among the biggest eggs relative to adult size of any animal. As a cephalopod, the nautilus is a member of the same family as octopi ...
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