Leather Dying I think??

[xxnonamexx]

I don't understand this has been healthy for the past 3 months now all of a sudden during the shedding stage it looks more like a dying stage. What is causing this? Levels are all good. I have a 55gal. 260Watt CoralLife Power Compact, 3 1W Lunar Lights, Live sand 4in DSB, 75lbs. Live Rock, 2 Cinnamon Clownfish, Firefish, Magenta Dottyback, snails, crabs, Feather Duster, Sabae Purple Tipped Anenome, 1 White Leather Coral, Red Sun polyp, assorted polyps, 2 Assorted Color Plate Corals, Pipe Organ, Frogspawn, Fox Coral, Flat Brain, Finger Leather, Mushrooms, Green Star Polyps, 2 8" Maxima Clams, Wet/Dry filter, Protein Skimmer, Heater, I have the Liquid Plankton and also frozen plankton and brine shrimp for food. What can be causing this? It has just shedded but now looks weird. I never touched it. I thought leathers are supposed to be easy to keep?

http/www.flickr.com/photos/59422509@N00/

 

[Great Lakes]

Is it even remotely close to the frogspawn or any other coral?

GL

 

[Navarre]

My thoughts also.
It sounds to me like chemical or biological warfare