IMO, no. This might not be the most popular opinion, but I don't think a 125 is even big enough. I like to keep a fish in a tank (very rough guide) that is around 5-6x the length and 2x the width of the fish's length. So a fish that's 15" should be in approximately a 72x30" footprint at least (if you've got the money go 96x30"). I'd say at the very least a 180 gallon for an adult pair.