Robo fish

This robotic fish, which looks like it was made out of precious
jewels, isn't, but was actually created to detect pollutants in the
earth's oceans.
The 1.5 meter long robotic fish each requires about $30,000 to
make. Their purpose is to head out into the open water, take in
data about water pollutants, return to a charging station about
every 8 hours and while charging, submit data about water
quality.
The issues with this first batch of fish is pretty clear - they're
way too expensive to be made in numbers big enough to be very
helpful; their charge lasts just 8 hours so they aren't able to
have a very large range away from their charging stations; they run
a pretty good risk of getting a bite taken out of them.
$30,000? Jesus. For half the cost of a single fish I'll rent a
paddle boat and troll the underwater sensors myself. I swear, these
idiotic scientists think a robot is the solution to every freaking
problem. Which leads me to my next question -- how much do you
think a robotic fish would fetch on eBay? Wow, really? Grab your
tacklebox and meet me by the dinghy!
Here the video of it
swimming