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.
ARTFINDER: Rainbow Trout by Abi Whitlock - The scales of a rainbow trout are a riot of subtle colour. I wanted to amplify this colour to create a bold and bright impression of the fish. The swirling w.