Hi there, I'm a newbie to cats but just purchased a L142 plec for my community set up from pier aquatics and i think I might be hooked already. This fish has tons of personality

The only issue is that the other fish(particularly my angels) think the white spots covering the fish are food!? As a result the plec gets very little peace and quiet when it's out in the open

. Is this a common occurence?? Will the other fish just get used to the newcomer in time?
Cheers Matt