I have a species in my sci-fi setting, that are basically land-dwelling sapient nautilus.
They differ from most concepts of "land-dwelling cephalopod" in that they're supposed to be the tallest creatures in the setting, towering over everybody else, up to three meters in height:
What anatomical quirks can allow them to have posture like in the provided picture, without taking away the dexterity and bendability of their tentacles?
I was thinking about some cartilage-like cores in the tentacles that are resistant to compressive forces but can bend to relatively tight circles, so the muscles of the tentacles mainly work to prevent the cores from bending the wrong way. Probably even with a gradual increase of bendability, so that they're stiffer near the beginning than near the "hands". Could that work?