Wife new 9 inch fish

[Chris Martin]

Sold to me as a blue unicorn Tang for 50$
Now his home is a 315 gallon

 

[Humblefish]

Nice! But why are the scales dark near his pectoral fin? Maybe just a large stress spot??

 

[Chris Martin]

Yes stressed she color's up once I put her in tank . When I feed her her face turns bright blue