The smartest creature of the invertebrates knows how important working out can be to a healthy, happy, and productive life.
Octopuses (or octopi, or octopodes*) also have no skeletons.
So no secrets lurking in their sea closets.
(Generally speaking, they don't have closets either. So they're all out about their sexualities.)
Having no skeltons also makes for one less Halloween decoration they have to put up.
That's what they put up instead.
* Too bad there aren't 8 plurals.
Well, now there can be: