Fish is about 3 years old. MJB is right, I got him at about 2 inches from Petsmart. His hump or Kock (for you Flowerhorn people) gets larger everyonce in a while. He killed my 10-11inch Flowerhorn about 2 months ago.
Thanks for all the compliments. He is the is the co-center piece in my aquarium, along with my Black Arowana.