I am fearing for Bruce's safety.

I believe Bruce is abusing his Yellow Perch and Redear Sunfish by using harsh language and making funny faces during feeding time; the fish then associate the pleasures of eating with the distinct displeasures of verbal abuse and sardonic imagery.

I believe this is making his fish take pleasure in destructive activities.

The end result is a common theme in western history where the keeper (Bruce) becomes the victim.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."