Definitely a red aro. The dorsal, caudal and anal fin displaying orange. Gold aros typically do not have orange on the dorsal fin. There are also hints of orange developing along its gill plate and scales on body. The way the orange color is developing along the scales is very typical for red aros. At that size, a Gold aro would have more pronounced gold color on 4, 5 or 6 levels of scales depending if RTG/HBRTG/XB.