What is the biggest porcupine puffer you have seen in a home tank?

[JimG1966]

I have a puffer that i have had for a couple of years. He is currently 15 1/4 inches long. I have looked around but not found anything that size. Ol Tugboat loves his morning belly rubs at feeding time and loves to set in the corner of the tank and watch me eithe watch tv or sleep in the reclyner.. he is the first to see me wake up.. all my fish have personalitys but his is as larg as he is..lol. If i sleep past feeding time he will spit water out to wake me up. I just realized i have no pics of him on the computer. All are on my phone.