PAUL wrote:
mixed or mosaic set up of unusual colors means dyed.
but for a homogeneous color like the red oscar, chances
are they are not. i have seen an oscar similar to my pets
having bluish shade of color. it looks like tilapia but had
that moon marking on the tail. i am very sure it is not dyed
because i am maintain the tank for the owner.
that depends on how the fish was dyed. fish can be injected by needle which gives them spots and patterns, or by being dipped into a dye which gives them that overall color. either way, the dye eventually fades away. both ways, it harms the fishes health and leads to health problems and a shortened life span.