In cephalopods, what is a pen?

We used to find the 'shells' on the beach at the Red Sea in 1951/52

HTH to clear some of the confusion. The gladius (also called 'pen' in English, 'plume' in French) is a rigid internal structure that supports a cephalopod's (ex: octopus, squid, cuttlefish) body. It is similar to our backbone.

WOW..confusing to me also!

Player Mr Knowitall, l thought was cuttle fish?

Wow! That's some pen. Never knew such long and complicated words could be associated with a pen. Maybe back in the day, fair madians would huddle together under a shady oak tree at someone's father's afternoon party and say, "Wow, check out the Decapodiforms on that Squire's pen..."

Lady of the Lake, Thanks for this. Got it wrong, but my direct afterthought was Cuttlefish.

I am lost by an easy way sometimes 😂

player mj88

One or two questions are hard

Very easy for me ♥️ ♥️

Indianola alkyl

Player mj88, this is so easy

hard intenal body part

cant believe I got it right!