Quote:
Originally Posted by Enoch Root
ISome type of sonar or radar type of sensory perception could be possible (imagine a world where the atmosphere is cloudy and opaque).
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Also, your basic premise was once again built upon earth-centric premises: hunting other prey.
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Radar is detecting radiation, and radar-sending organs are therefore a type of eye. Sonar is a kind of echo-location. Those are not alien concepts beyond human comprehension. Senses are just not a good basis to argue for truly alien aliens. Sex and reproduction is much more likely to be a source of mutual incomprehension, a species that has thousands or millions of young, of which very very few make it to adulthood, is not going to be able to emotionally relate to human culture and vice versa.
As far as "prey" being an earth-centric concept, again there are a limited number of ways living beings can convert energy for their own use. Gathering energy by killing and consuming other beings is a low-effort solution, and I'd even argue that it's not possible to evolve complex ecologies without predators, diseases and parasites. Evolution is all about feedback from both the environment and other organisms, and sentient clouds (or whatever) peacefully munching on sunlight have nothing forcing them to evolve.