Discovering nature. Things I never knew

Yesterday, after attending a wonderful storytelling performance, we were at the pub and somehow got talking about squid and octopus.  I always imagined them as kind of flat like a plate with legs sticking out of the sides.  I learned that a squid is different shaped than an octopus and more cylindrical.  I love learning things I never knew about how things look and are shaped.  I don't much fancy going to touch a real one of these creatures so will settle for the descriptions provided to me by sighted people.