Strange fish in the lake! What are they?

I was walking along the Lakes Edge and heard loud splashing it kind of sounded like a dog in the lake. I tried to catch it on camera but it might not come across the same. it turned out to be what look like almost salmon sized fish rolling around I thought maybe they were feeding but then while I was watching I don't know quite what they were doing.

[@pupsteam]

Shit I hope they are doing the spinning stuff like in Florida - something is wrong with some of the fish in Florida , they are investigating it -