Angel Fish Gill Plate Not Moving

[Joller]

had a sudden heat wave yesterday and my temperature shot up to 32c!!
and today i come home and my angel is only breathing with one gill, the other gill plats looks as if its clamped shut
do you think its a reaction to the temperature change or possible aggression?
how could i treat this?

 

[Joller]

it's still acting completly normal, eating, colouring, behaviour is all the same.
gonna do a 30% w/c and add some melafix to avoid infection? at the moment i can only think it would be caused by another fish.

 

[WILDER]

Is there plenty of aeration in the tank.

How many fish and which type.
Water stats in ammonia, nitrite, nitrate, and ph.
How many gallons or litres is the tank.

Do the gills look swollen, red inflamed, or pale with excess slime.
Anything on the gill like strands of cotton, or fungus, or parasites.