Honestly its nearly impossible to measure him... id guess he is about 13" maybe.. Mine is really slowed down in growth, but thick! Soon he will go into a bigger tank, right now he is alone in a 5x2 tank.
Does all GATF have yellow sheen on them? I have 2:
One has almost none or very weak yellow sheen. Has silver body. Very thick. Grow very fast and eat like a storm but kinda jumpy.
The other one is normal. The body look more bronze and has yellow sheen. Slender and doesn't each much but very aggressive. Very calm.
Is it because they're from different river, or they're simply an opposite sex?