I had a Sohal for 12 years. It was 14 inches in a thousand gallon tank. It was king of the tank but never hurt anyone. It would often break up fights between other fish. I have had my current sohal in my FOWLR tank (two thousand gallon) for six months. It is five inches. It picks fights with every fish including a 7 inch black tang that will often kick his ***. He however leaves the 2 foot unicorn and 12 inch valmingi alone. Does not bother the large emperor or french angel either but everyone else is fair game. I hope he does not grow up to be a bad seed.
The previous one would let me pet him but had the bad habit of biting and pulling on the hair on my hand when ever I would work in the tank. That would really hurt. I think he thought th hair was blood worms or something like that. They are very powerful fish. I had a sailfin cut my hand once and it bled all over me, I can only imagine what a sohal could do if it wanted to hurt a fish or person.