cuttlefish

 
Pronunciation: /ˈkʌt(ə)lfɪʃ/

noun (plural or cuttlefishes)

  • a swimming marine mollusc that resembles a broad-bodied squid, having eight arms and two long tentacles that are used for grabbing prey. Its internal skeleton is the familiar cuttlebone, which it uses for adjusting buoyancy.
    • Order Sepioidea, class Cephalopoda: Sepia and other genera

Origin:

late 16th century: from cuttle + fish1