I added my last tank inhabitant, a blue mandarin. My 3 year old kole tang all of a sudden became super territorial throughout the entire tank and has pushed the mandarin into hiding in the corners of the tank and the mandarin isn't eating because of it. It's the first time it has ever exhibited aggression towards another fish. Should I give it another couple of days or will it mostly persist? I've kept the tang well fed and have tried the mirror trick but it doesn't work. I can't rearrange the rockwork and catching the tang would be a nightmare/borderline impossible. It's a 48" x 22" x 14" (L x W x H) tank and it has apparently claimed the entire tank as it's territory. I'm debating on putting the mandarin into my 10 gallon temporarily and giving it away to another hobbyist if it will continue.