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:
Tentacle:
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.
According to my friends, my spirit animal is an octopus. I’m ok with that.
Blue ringed octopus (genus Hapalochlaena). Taken in Malapascua, Philippines.
No marine animals and corals were harmed when this photo was taken, nor were any rocks (substrate), or animal environment disturbed. No pokers/muck sticks were used and no behaviour manipulation was employed.
If that’s how you take photos too, include the above in your captions and show that you don’t need to manipulate, damage, or destroy anything to get a decent shot.
Anonymous
