Has anyone noticed a change in behavior in your fish after the death of one? I only had 4 fish and very sadly lost my royal gramma who was best buds with my pj cardinal. My cardinal has been acting very differently and honestly kinda mean since the loss. I though pjs were peaceful but she’s been going after anyone that comes near her. Could she be feeling less safe since her buddy died? Should I get her a companion, do fish grieve?