This morning, I was checking out my longnose gar and it the skin seem to be changing color... going from natural grayish to spotty white. Anybody got any idea? Right now, he is housed with 14" Tiger Shovelnose Catfish, and a 25" Pacu in my 120 gallons tank. They been doing fine for awhile till now. Anybody got any idea what cause the spotty white color on Gar skin?