This just came out of my Uni today, a nice chat about the intelligence of fish that mixes together angler's and researcher's view points on fish smartness. Really interesting actually. There's a cool explanation on an experiment on archer fish and how well they recognize targets. I thought it might be of interest to some here.
https://naturallyspeaking.blog/2017/02/22/episode-49-how-smart-are-fish/
https://naturallyspeaking.blog/2017/02/22/episode-49-how-smart-are-fish/