I named my big one SCARFACE because he destoryed the inside of glass with his teeth, He ended up living up to it,One day I was moving something in the tank and he got my hand and ripped open from pointer knuckle across my hand to the pinkie knuckle,The only thing that stopped it from going deeper was my knuckles,By the time I was able to get my hand out of the tank the whole tank was a deep shade of my precious blood, So you should name him SCARFACE!!!!!!!!