unknown disease

My parents recently got a Tiger Wardi Goby and the little fellow is in quarantine. He's been doing fine so far, but within the past couple of days he had what looked to be a bruise on his lip which has formed into what (to me) looks like it's rotting off. None of us have any idea what could've...

I recently saw this with my goni, anyone knows what it is?

In qurantine tank all the parameters are fine but the chromis can't swallow any of the brine shrimp that I feed it today. For the past 1½ weeks it was barely able to eat any of it, going on and off on it's ability to swallow but when it did it would only eat about 4 or 5 pieces at best...

Hi about 3 days ago these zoas stopped opening up all the way and looked odd maybe deformed. The tank is fairly new maybe a little over 4 months now, so these zoas we're still growing on the plug. I noticed that there was a couple white sponges growing on the back and the side of the plug as...