I can only wonder if what could be possible by today's hardware and monitoring techniques.
There's a Wikipedia article on marine animal training : https://en.wikipedia.org/wiki/Marine_mammal_training
https://en.m.wikipedia.org/wiki/The_Most_Dangerous_Writing_A...
At about 300W of GPU + 120W of PC, that is 420W * 0.5hrs = 0.210kWhr. This is a rounding error on my monthly electric bill. About six cents.
I've spent more energy than that likely just sitting and reading HackerNews this week.