Guy 'fishing' in Belair pond

[Castleton]

I'm not sure about what I saw today and just wanted to put it out there...

A friend and I sat on one of the benches near the pond and a guy had a small net that he seemed to be catching fish with! Smallish fish, he just went from side to side and put the catches in a bucket.

When we left, I asked what he was catching and he said insects for his koi carp!

It wasn't insects! But is it suspicious? We both felt uneasy he was taking something from the wildlife