I have an orange ocellaris clownfish I got about a month and a half ago. He has always looked a little skinny (and is very small) but I fed him normally. Now he is portraying more aggressive behavior and you can see a red line going through his body. His top finn also seems like it’s shrinking or something? I have attached photos of what he looked like a couple weeks ago, to a few days ago, to now. And a video of now. Also the line is much more visible in person.