A few of the old school OI captains flew/fly their flags right side up for a release, up side down for a "belly up" dead fish. Paul Spencer is one who whould do this. Not sure if Fin has always done this or not.
Makes sense! I have seen some advertisements for Spencer that had 2 whites and a blue with flags right side up and always wondered about it.(the ad was for the 43 IPS boat)