u/Ecstatic_Abroad1623

Hi all, sorry for another one of these posts but I recently picked up this shining gyarados. I’ve read most of what’s online as far as determining if it’s a double holo or not. So I’ve got 2 questions to discuss…
Is this a double holo? (I think it is but maybe I’m wrong)
If it is, has anybody seen the highly reflective line at the top of their double holos that can be seen in the 3rd image? Does this line appear on all Shinning Gyarados or just the double holos?

Thank you!