Mantle length ml is the standard size measure for coleoid cephalopods shell diameter being more common for nautiluses and is almost universally reported in the scientific literaturethe mantle is the cephalopods body lying posterior to the head and enclosing the visceral mass and mantle cavity the latter being used for locomotion by jet propulsion. Get free computer wallpapers of coral reefs. The whale shark is a filter feeder one of only three known filter feeding shark species along with the basking shark and the megamouth sharkit feeds on plankton including copepods krill fish eggs christmas island red crab larvae and small nektonic life such as small squid or fishit also feeds on clouds of eggs during mass spawning of fish and corals.