Tentacles vs arms
Solving (partly) an old conundrum
You might have come across confusing statements like "octopuses have arms, squids have tentacles" and wondered what's the difference. I did and here's the (unsatisfactory) answer.
Cephalopods (squid, octopus, nautilus and a number of other aquatic creatures, which are a class of mollusc) have a number of muscular "limbs". Traditionally …