DictionarycuttlefishMarine mollusk
noun

cuttlefish

KUT-uhl-fish/ˈkʌtlfɪʃ/

A marine mollusk with arms, tentacles, color-changing skin, and an internal cuttlebone.

The cuttlefish changes color as it moves across the seafloor.

A recognizable cuttlefish hovering above a small patch of seabed, with its broad oval mantle, rippling lateral fin, clustered arms, two extended feeding tentacles, and mottled camouflage clearly visible.
Etymology

Cuttle continues an old name for this animal, with fish added to form the compound. The older name may be related to Germanic words for a container or pocket.

In context

Real Science2:00
how are cuttlefish able to match the pattern and color of their skin to their environment when they can't even see color
The Insane Biology of: The Cuttlefish

More examples

  • A cuttlefish catches shrimp with two long feeding tentacles.
  • The cuttlefish releases a cloud of ink and escapes.
  • Several cuttlefish hover just above the sandy bottom.

Forms

cuttlefish · cuttlefishes

cuttlebone noun — The lightweight internal shell of a cuttlefish.