today my Oranda goldfish got stuck behind one of my large rocks in the aquarium. This has never happened before, I leave a large gap but he still managed to get stuck. He couldn't have been stuck for more than ten min but I did notice that one of his pectoral fins is now injured. It has some blood spots and is clamped to the side of my fish, he is not moving it at all. My question is, will this heal? I would be so sad if my little guy was never able to use his fin again.
I have a 45 gallon tank with one other fancy goldfish. Tank parameters are all at 0. I will attach a picture.
Thanks in advance for the help!!!