can anyone please help me, today i saw a mark on my rtg arowana's head back side. i think it's some kind of scratch. but want to make it sure....please see the picture for more info...thanks
Probably jumped and hit something. Clean water should be enough but you have to you may add some aquarium salt or catappa leaves to prevent any eventual infections
Yeah it's pretty easy for Aros to get scratches, they heal up pretty quick,. esp. if lighter ones like that -- luckily it didn't lose the scale there, which takes a lot longer to get back to normal appearance.