Question: Are my fish okay?

I just got a sm. Black Moor, a sm. Bubble-eyed goldfish, and two small koi looking goldfish. I noticed their mouths are opening and closing quickly, but I don't understand why. I did the bowl the other day when I cleaned my betas tank, his water is clear, and he is swimming all fine. The other tank is cloudy. I can only assume it is the aquarium gravel doing the water bad, because I have glass and plastic gem/stones with my beta. I took my fish out of the tank and put them in a tall glass of water, but I cant remember if they were doing this at the store or not



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