If you decide to remove this I think great caution must be taken especially if this is a fish. There may be sharp bones facing the wrong direction. Those bones could damage/puncture the anal canal or vent. This item needs to be identified first. As other have suggested warm water soaks are good. Even if you have to force them by using a small container which keeps the area under water most of the time. Removal is risky and would probably be done best by a Vet.