Angelfish has turned aggressive

[Reef Johnson]

Have a pygmy Yellowtail Angelfish that has been in my 90g. tank for 6 mos. He is suddenly being aggressive toward Chromis and a few of the other smaller fish. I have not added any new livestock in over 3 mos. except for a couple inverts. Why the behavior change? Have tried yelling at him, but no luck. I'd hate to get rid of him as it's a great looking and healthy fish, but he's being an a....hole.

 

[Tahoe61]

Try the mirror taped to the side of the tank tick. He will get distracted.

Good Luck.

 

[Reef Johnson]

Well tried the mirror and not sure if he just tired of chasing the other ones but they seem to be getting along better now. thanks.......