What are they doing?

[msuhaizie]

Anyone can explain what happen to my torch coral.. They looks like releasing something from their mouth with brown color.. Is it normal?

 

[TLTGF]

I don't know, but if you find out I'll be happy to know as I have a hairy mushroom that does the same thing. Long brown super flat and skinny something that comes out and sweeps around...

 

[msuhaizie]

It doesnt look like mushroom but sticky liquid.. And my torch coral took about 20min before back to normal.. I'm worried if that liquid can effect my params and harm another corals.. Huu...