i had one that my yellow goby killed!!!! yes, its true... then i had another one started off at about 3 inches.... (i had to get rid of the yellow goby becuase he attacked this one too)
he out grew the tank (75g) in about 3 months top.... no joke, he must have been at least 7 inches... i have never seen a fish grow that fast in my life! b4 i could get rid of him he died................. he was very active and a pig when eating... i would love to get another, but that when i'll have a 200 plus gallon.............