And people sometimes eat them, even when they are reallllllly FRESH.
But! Did you know that octopus tentacles LIVE ON even after you've cut them off an octopus body?
EXQUEEEEEZE ME?
UH YEAH. According to Katherine Harmon, who's writing a book on octopuses, their "arms can continue reacting to stimuli even after they are no longer connected to the main brain" FOR UP TO AN HOUR.
So in other words, octopus tentacles can continue to flex, move, and respond to the world around them even when they're detached from an octopus brain, because they FEEL FEAR.
Alsooooo, severed octopus limbs will attempt to grab food and bring it to their phantom mouths as a REFLEX.