I had one of those once. He was a SPAZZ!!! Everytime I walked near the tank he flipped out. I had my arm in the tank rearranging something and he flipped out and shattered my submersible heater with my arm in the water. Got my arm out without getting shocked. Bagged it up that day and took it to the petstore.
He was sweet, but he was nuts. I got $30 of credit for him and they put a $90 price tag on it because he looked that good. Just wish I could've put it in aquatic prozac or something....
That being said yours looks much better than mine. Mine only hit 7 inches or so before I dumped it....