I was told years ago that holding a fish vertically, whether by the gill plate or back of the "neck", causes internal damage due to the fact that their organs pull down by sheer gravity, and possibly causing organs to tear. Not sure if there is any truth to this, and I too have been guilty of the "gill grab" for a quick picture, but after a reminder like this, I will try and remember to use both hands and keep them horizontal to minimize damage to those big ol girls before releasing them. Only problem I've been having lately is having the time to get out there and get my hands on one of them fat bottom girls!