Hello, I Recently bought a favia one day ago and Acclimated it to the tank and it looked healthy that day but this morning I saw it’s mouth was wide open and a wanted to know what is wrong with it??
I've got quite a few favias and every once in a while the mouth will open and it will excrete waste. Do you notice any feeding response when the lights go out? That's typically when mine will open up put out feeder tentacles.