At about 88 secs in the second video[1] they show the inside of some sort of "trap" for the fish where water flows rapidly over a grate (and claim "volitional e

At about 88 secs in the second video[1] they show the inside of some sort of "trap" for the fish where water flows rapidly over a grate (and claim "volitional entry"). But I agree it's still an open question whether you could mitigate the fish's behavior effectively. [1] https://www.youtube.com/watch?v=wSBS2F9VXaE#t=88 https://www.youtube.com/watch?v=wSBS2F9VXaE#t=88