Ack!! I'm so sorry to hear this.
What other fish are in the 55 gal
Looked it up in your profile:
1 55Gal community tank with 4 Angel fish 1 Honey Gouramis 1 Blue Gouramis 1 male Betta 1 Female Betta 2 Ballon Mollies 1 Black Molly 1 Pleco. Live plants and a Hagen co2
injector. Gravel substrate. 2 penguin 330's a Fluval 404 and 200w heater.
How many angels are left? How long have you had them? Any changes in the tank recently--substrate, new fish, new heater...?
Do the other fish chase the angels?
I am going to move this to unhealthy fish.