I'm so sorry about your Angel! I understand how you feel, fish are sweet creatures and are extremely intelligent.
He lived a good life
Glofish are part of my hobby and one of them died the 4th day after taking them (RIP Ruby) and it's okay to grieve them... They're pets after all. This makes me very anxious because I'm leaving for a trip for sixty days and left nine of my Glofish under my dad's care.
I really feel sorry for your fish, I'm sure they're in fish heaven now.