Is cuttlefish another name for squid?

No, cuttlefish and squid are different types of cephalopods. While they share similarities, they also have key differences:

Cuttlefish:

* Internal shell: They have a unique internal shell called a cuttlebone, used for buoyancy control.

* W-shaped pupil: Their eyes have a distinctive W-shaped pupil.

* More rounded body: Their bodies are more rounded and compact compared to squid.

* Short fins: They have short, fleshy fins along their sides.

Squid:

* External shell: They have a thin, transparent, internal shell called a pen.

* Round pupil: Their eyes have a round pupil.

* Streamlined body: Their bodies are more streamlined and torpedo-shaped.

* Two long fins: They have two long, triangular fins at the end of their bodies.

In summary: While both are cephalopods, cuttlefish and squid have distinct physical characteristics and are considered separate species.