Nautiluses are the sole living cephalopods whose bony body structure is externalized as a shell. The animal can withdraw completely into its shell and close the opening with a leathery hood formed from two specially folded tentacles.
The chambered nautilus lives in tropical waters extending from the Andaman Sea east to Fiji and from southern Japan to the Great Barrier Reef. This animal usually lives where the slopes of coral reefs descend into deep waters.
theartfulgene: “Nautilus is one of the best examples of the logarithmic spirals found in nature. Famous mathematician Jacob Bernoulli said that logarithmic spirals are a symbol of “fortitude and constancy in adversity, or of the human body, which.