Post tagged: biology

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 …