What is wrong with my Oscars??

We have three (what we think) are Yellow Oscars. All three of them have developed blueish/blackish lines and spots all on their bodies and fins. We have no idea what the cause could be or if it is even normal. All three fish seem to be fine other wise. What is it? This is what they look like. Thank you for yours help!

 

Is it just me or it just doesn't look like an oscar?

 

Yeah I don't think that's an oscar. It looks like another fish I've seen before, but I can't think of what it is.

 

That doesn't appear to be an oscar shape. Maybe their true colors are coming in?

 

They came with the tank. We have had them for almost a year. No idea how old they are.

 

If you could answer a couple questions, we can possibly determine what they are.

How big are they?
How long have you had them?
What size tank are they in?

Welcome to Fishlore by the way!

 

Perhaps it's a gold severum?

 

Yes, gold severum!! Thanks!!

 

Yeah, that's a Gold Severum.

 

Hmmm how long have they been there

 

almost 3 months