The Cephalopods' Hideout

a bunch of squid and ammonoids hide in a forest of sea lilies
(Julius Csotonyi, Smithsonian Institution)

Swimming among the arms of the crinoid sea lilies and beneath the log is a community of cephalopods that include the spiral-shelled ammonoids (Lobolytoceras, Phylloceras, Harpoceras, Dactylioceras, and Hildaites) and the ancestors of today's squid (Loligosepia, Passaloteuthis, Phragmoteuthis, and Salpingoteuthis).