I am actually trying to find a new home for mine.. He ate my iridescent shark and shovelnose lima catfish after i bought 50 feeder fish for him and my couple other fish, and they were gone in 4 days.. It is aprox 16-18" right now. I got him from a pet store that said the owner didnt want it any more , and it has always been in fresh water. so i did the same and he seems fine.