Last night I noticed these white areas on two of my fish that were not there before, one of them has already died. My first thought was ich but these white areas appear to protrude off the fish and are not perfectly round, so I feel like it might be something else. It appears currently on the fish's fins and tail. I think the video makes it fairly visible, especially how it protrudes off of the fish. The other pictures are not great because it is still currently small. Any tips on what this may be/how to treat it would be incredibly helpful, as I don't want to put Ich-X or antibiotics into the water without knowing what this is.