Just a few minutes ago I turned off the lights to go to bed then I quickly heard a loud splashing, I went over to check to see what happened and I saw that it was my silver arowana making all the noise and that his bottom jaw had skin hanging off of it and that one of his feeler things on his chin was broken (all on the same side). Do they get scared when the room quickly goes from light to dark? And will these both heal up like new?