What are these?
 

In stead of making two threads I thought I'd put them in one.

I have these growing on power heads and had them on glass in the past. I'm talking about the polyp looking thing

http://uploads.tapatalk-cdn.com/2016...308b4f7e43.jpghttp://uploads.tapatalk-cdn.com/2016...5a4d120023.jpghttp://uploads.tapatalk-cdn.com/2016...4406339199.jpg

Secondly, my zoas are exploding like they seem to for others. The frag fell off the rock to the bottom and I noticed this weird looking stuff on the frag. Any ideas?

http://uploads.tapatalk-cdn.com/2016...b870957626.jpghttp://uploads.tapatalk-cdn.com/2016...d3c86e940c.jpghttp://uploads.tapatalk-cdn.com/2016...b547063d52.jpg

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First pic is pineapple doing nothing to worry about and they come from good watter quality!

Thanks. I was worried I was doing something wrong despite my parameters looking right. Can u elaborate on what a pineapple is in this context

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pineapple sponge

1. Sponges
2. If its Bryopsis, DON'T do manual removal inside the tank. You will make things worst. If it is, I would throw the throw the whole rock away.