nounplural noun cuttlefish, plural noun cuttlefishes
A swimming marine mollusk that resembles a broad squid, having eight arms and two long tentacles that are used for grabbing prey. Its internal skeleton is cuttlebone, which it uses for adjusting buoyancy.
Order Sepioidea, class Cephalopoda: Sepia and other genera‘Nautilus shells are often used decoratively, and the internal shell of a cuttlefish, or cuttle bone, is sold in the pet trade as a calcium source for birds.’
- ‘The whale's prey includes squid, cuttlefish, herring, and sea stars, or starfish.’
- ‘Ammonoids are descendants of the extinct, primitive coiled nautiloids and they are extinct relatives of modern squid, octopus, cuttlefish, and nautilus.’
- ‘Both cuttlefish and squid may be called inkfish.’
- ‘Her current experiments on learning suggest that both cephalopods do well with spatial learning; cuttlefishes seem to learn their way around a maze with the same facility as octopuses.’