Q:What’s the difference between an arm and a tentacle, in regards to cephalopods?

Anonymous

molluscfacts:

The difference is cephalopod arms have suckers all the way along their length, but tentacles only have suckers at the end (except for nautilus tentacles, which have no suckers).

Arm:

image

Tentacle:

image

So octopus have 8 arms and no tentacles, squid and cuttlefish have 8 arms and 2 tentacles (except female cuttlefish, which have 6 arms), and nautilus have around 90 tentacles and no arms.

Source: molluscfacts

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