They are considered ancestors of the ammonoids, as well as of the coleoids (octopus, squid, cuttlefish, and the extinct belemnites).
en.wikipedia.org Many cephalopods including octopus, cuttlefish, and squid similarly use colour change, in their case both for camouflage and signalling.
en.wikipedia.org In 2011, it was estimated that only 33% of the 2010 population had returned to breed, less than 80,000 cuttlefish.
en.wikipedia.org The marine molluscs are the snails, clams and mussels, chitons, octopuses, squid and cuttlefish; that live in marine and estuarine habitats.
en.wikipedia.org The province is renowned for its agricultural produce, in particular potatoes and fish (cuttlefish and pollock).
en.wikipedia.org