the one i got now grew fast till about 12 inches which only took like 8 or 9 months now ive had it for about 4 years and its around 13 1/2 or 14 inches long dont expect anymore growth.......... my fish always had a food supply was in a tank with my convict fry it was a 55 and he grew sooooooooooooo fast mine is also WC and female........... i have noticed most CB bichirs grow slower than the wilds under the same conditions....... dont know if urs a CB or WC.......