> If you’re inclined to be pedantic about the nautilus’ limbs and say that /actually/ they are “arms” and not “tentacles” because tentacles have suckers on them

> If you’re inclined to be pedantic about the nautilus’ limbs and say that /actually/ they are “arms” and not “tentacles” because tentacles have suckers on them, then (a) congratulations on remembering that long-ago biology class, and (b) see Footnote 1, above. Something tells me an arm is a mechanical limb composed of connected poles that turn at their joints. And a hose-like limb without suckers should have its own name. A foot is an "arm", a penis is something else.