Help!!! Emergency!!!

Please help. My passer angel, who has always been strong as an ox, is lying on its side. I am testing water now. My lion, who has been looking abused lately, is looking even worse. Is it possible the angel attacked the lion and got stung? Will the angel recover? any other emergency measures I can take? Please let me know. Everyone else in the tank appears fine.
 
No I do not. However, the Lion has died and has been removed, the angel seems to be recovering. Keeping fingers crossed. Any meds needed?
 
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