Alien kids putting the puzzle back together: dammit, another crab! Mom, let me try another!
That’s probably why aliens never made contact with us.
We are freaks of nature. We didn’t evolve into crab.
All our sci-fi series depict bipedal creatures all over the place.
The rest of the universe just isn't represented, man. Make more crab fiction and the aliens will visit!
Right? Or prehensile tails and yodel like the Swiss do when you carefully crush their nuts in a vice?
I hope that there is a resurgence of alien sci fi and, using the current trend of trying to be as realistic as possible, we shift from the alien grey model to the craboid.