Red Marks on Green Chromis

[LifeIsGreat]

I see this post is a bit old, but for anyone else seeing this I had a similar problem with a blue chromis a few days ago and the infection spread to my other fish. The host chromis and a clown died before I could do anything about it. Then I dropped some Jungle Fungus Clear into the tank and it seemed to stop the progression of the disease. Now the fish are getting better, minus some loss of tail fin length.