Nautilus shell, Section through the shell of anautilus
Science Photo Library / Alamy Stock Photo
Image ID: B6E2CJ
andlt;strongandgt;Nautilus shell.andlt;/strongandgt; Section through the shell of anautilus (andlt;emandgt;Nautilus sp.andlt;/emandgt;), revealing its spiralstructure and chambers (camerae). The nautilus isa marine cephalopod related to the squid.