What is this?

fishguy597

Member
Not sure what this is but I believe it's a pest.
 

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They just look like puffs of cotton. I did a bayer dip and it seemed to weaken them. They start at the base or the tips. Once removed there is a bare spot where they were. As of right now I have good color and pe.
 
Some one has to have run into this. I have been keeping an eye on my coral and have been finding more of these. I just put some interceptor in the tank which is probably pointless. Should I just do a bayer dip to everything?
 
It definitely not eggs. I have scraped it off of the corals effected by this. I also did a Bayer dip and it had no effect on it. I'm leaning towards a fungal infection. I'm just not sure though. I did a Google search and cannot find anything that looks like it except a thread on here entitled fungus on sps which I revived the thread. It looks the same as his pics.
 
It is very difficult to tell by those pictures, but it looks to me like they are mesenterial filaments. If that is indeed the case, then either something mechanically damaged the location or something prompted the coral to evert them. The latter can range anywhere from food, another coral's slime, pieces of another coral, etc. Chemical cues in the water can also cause them to evert filaments.
 
I have had two mysterious coral death in the last month so it's possible.It's not killing this coral yet but it is killing patches of the zooanthella. If you look at the second pic there is a bigger dead spot where I scrapped off the puffs of fugus ,infection, pest , or what ever it is. Not all of those spots are where the polops are. That is where the filaments come from in my observations. Now the filaments in theory would retract at some point in time correct? I have been noticing these spots have been on there for weeks. Once I noticed this I have been keeping a close eye on all of my other coral. They were fine. Now I have found another couple of coral doing it.
What could I do about the chemical cues to prevent it or prove that theory ? I have done some large water changes of 20% the last couple of weeks. But there hasn't been any change.
 
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