Why not just trust Mel's estimates on the fish that he keeps and takes care of everyday? He's never come across as the insecure type that would have to lie or submit his fish to an unnecessary measurement. Maybe you could just ask him what his most recent estimated length of his Dovii is and just leave it at that. The fact remains that Dovii can reach 30", whether that is commonly seen or not. This really shouldn't revolve around Mel's Dovii though. He has a prime example of a large and healthy Dovii and that should really be the extent of the comparisons to other ones. I just hate to see the word of a man doubted when he's not here to defend it.