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.

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
how are cuttlefish able to match the pattern and color of their skin to their environment when they can't even see color
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.