Fish In Our Lake

If it's in a lake, presumably it's a cold water fish, possibly a native of where you live. I don't know much about cold water fish, and the little I do know is about goldfish.

Hopefully someone who knows more about cold water fish will be able to help. If you could tell us the region where the lake is, that would also help.

I am in Gloucestershire - there used to be golden orfe in the lake so maybe this a cousin?!