You can often see the fish feeding and you can learn so much about their behaviour by watching them in shallow water.
I caught a number of small roach, all in pristine condition except for one which bore the signs of being attacked by a predator.
You can see that fish more clearly in the YouTube short below.
There weren’t any marks from teeth, just missing scales, so it could well have been a perch as opposed to a pike, which is the fish that usually comes to mind.