HELP! What's with all the discharge coming out from my mushroom corals??

I'm wondering if it is the insides on the mushroom coral or is it their white mucus?And why is there light yellowish-brown stuff( in this picture, the light yellowish-brown stuff is partially surrounded by the white stuff) on them too?????

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Looks like they may be trying to bleach to me.Could also be something eating them,or they could just be taking a crap.
Ah, i didn't try to blow it off with a turkey baster.....I went overseas for a few days..and 5 days level what you saw in the picture is gone. I'm bewildered by it.:/
Only soft corals shed! dustin P74 has you covered! I dont want to take all the credit! Dustin knows a hell of a lot than i do!