injury

This morning I noticed that my hippo is favoring one fin. I can’t tell if he is injured or has the start of a fin disease. video is long - around the 2 min mark is a good shot. I was videoing the Anthias as well. He was introduced to the tank a month ago. He came larger that I thought he would...

Wondering if anyone can tell from the not-so-great pictures what might have caused the splotches on my mimic lemon peel tang? Today he has some silvery white blotches on his side. They look similar to the silvery white that has developed under his pectoral fins, which have been this way for a...