I am new to aquariums and have 2 blackfin sharks, I've had them for about 3 months now and untill now they have been great. My problem is I noticed yesterday thats they both have this "stuff" on them, it looks kinda like they are shedding is the only way I can describe it. None of my other fish have this on them so I was wondering if anyone could tell me if this is something normal for this type of fish, and if not do you know what I can do to fix them?
Thank you
Thank you