I just got this guy today, he was the most interesting betta I have found in the chain pet stores so I got him thinking his coloring was very unique but after looking at him awhile in his new home I'm wondering if hes got an illness or wound on is head, he is swimming around just fine, super aggressive though. As you can see in the pictures his whole head is dark red with white/yellow color on the underside, does this look normal or does it look like something I should be concerned about? thanks!