white stuff

So for the past 5 days I have been monitoring this weird spongy transparent looking stuff moving in on my green zoas out of nowhere. The zoas have been there for months and I have not added much of anything to the tank lately. I still can't quite tell if it's affecting them since when they open...

Just got home w new star fish. It's releasing white stuff. Is that poop or defense. Is it toxic should I get it out of my tank??? Not sure what kind , looks like choclate chip but red..

I have a 55 gallon mixed reef and I have added some red sea sponges and until recently they were doing great. Now one of them has a thin white film that starts from the tips and seems to be creeping down to the base. Is this the way it gets rid of waste? Do I need to provide more flow? or is...

hi everyone i have some things in live rocks im not sure what they are any help would be great