I agree. Looks like a lent without the body markings.Does look like a faded lenticulata.
They are mean and can overpower a lot of fish. 300 is a good size. I’d exercise caution and put plenty of cover. Mine went after other aggressive fish and only left innocent fish alone.Ok thanks pal, you think it could regain the markings in a nice setup?
Also chances of a comm with arowana, amphs, jaguar and wild Oscar?