Bivalves such as mussels are aware of many stimuli but are generally incapable of safely relocating making them one of the incredibly few exceptions to the rule.
I would generally assume any alien lifeform we encounter would be closer to humans than bivalves.
How much “exploring” do sedentary lifeforms (plants, mussels, etc) really get up to?
https://en.wikipedia.org/wiki/Dorsal_root_ganglion
Bivalves such as mussels are aware of many stimuli but are generally incapable of safely relocating making them one of the incredibly few exceptions to the rule.
I would generally assume any alien lifeform we encounter would be closer to humans than bivalves.