>>10083577>How the fuck do they know exactly where some weird flatfish will choose to stay stillThat flatfish is planted there. Its deliberately placed so that they can set up the cameras, anon. Because yes, otherwise, this shot would be almost near impossible.
Most documentaries have this kind of setup, since to display the immaculate ongoings of nature isn't exactly easy. It would make for a really boring documentary if you have a seabed and only have a camera capture like 0.01% of the total thing, which nothing ever happens on because the bird didn't happen to swoop down exactly when a fish was staying still.