Is a cuttle fish fish?

While the name "cuttlefish" might lead you to think it's a fish, it's actually a cephalopod.

Here's why:

* They are mollusks: Cuttlefish belong to the same group as squid, octopus, and nautilus.

* They have a different internal structure: Unlike fish, cuttlefish have a hard internal shell called a cuttlebone.

* They breathe differently: Cuttlefish breathe through gills, while fish use their gills for breathing.

* They move differently: Cuttlefish use jet propulsion for movement, while fish use their fins and tails.

So, while cuttlefish live in the ocean and are often called "fish", they are not actually fish.