Picture this robotic snakes swimming around ridding the water of heavy metals (cue wyld stallyns music) Powered by bacteria, fueled by all the good vibes of the world these automated robotic horrors swim around absorbing heavy metal particulate matter, keeping them safe from being consumed by fish.
See when fish eat heavy metal (Cue Guitar Riff) it is really bad. Since they can’t digest the metal, they store the nasty bits in their fat cells. When we eat the tasty fishes we eat the heavy metal, which in large quantities poison people…
Poison fish? Not good. But possible sentient robitic snakes? Swimming free… not sure how i feel about either of those options.
Maybe skynet is actually going to be Fishing Net? There is already video of prototype swimming robots… so it isn’t tooo far off, just really freaky.