Button Polyps - Is this a problem?

[masterkaw]

I don't know if this is a problem or not. There are two of my polyps that flipped open. I attached a picture to better describe what I'm talking about. What does this mean? Is there something that might not be right? I don't have a good camera right now. I took this picture with my phone. Any ideas?

 

[Amphiprion]

You mean that they completely folded backward? I have seen this before, but nothing necessarily negative stemming from it. They all look healthy otherwise. It may be worthwhile to look for predators, like sundial snails and nudibranchs, however.

 

[masterkaw]

You mean that they completely folded backward? I have seen this before, but nothing necessarily negative stemming from it. They all look healthy otherwise. It may be worthwhile to look for predators, like sundial snails and nudibranchs, however.

Yes, that's what I meant completely folded backward. Is it easy to spot a nudibranch? Will they be out when the lights are on?

Another question, there are three polyps that are green (nice looking). Then I have the rest of them that are brown. Do I have two different kinds or do they change colors? They all look exactly the same.

 

[masterkaw]

I have a couple more questions.
1. If you look at the picture, on the left side there is a live rock that has green on it. It looks like tiny grass. It looks very nice. Is this a good thing or not? It seems like all the rocks are getting it. Also the coraline is growing a very nice maroon color. Is this good?

2. Talking about snails, I see a lot of snails that were not there when I first started, is there something that is making them reproduce so much? Should I pick them out and maybe throw them in the fuge? Is it because of excess food? I don't feed very much but I was wondering what could be causing them to reproduce.

 

[Amphiprion]

The fuzzy green is likely Bryopsis or something similar. Not really something you want. Maroon coralline algae is fine--there are many different colors, mostly some sort of red shade. The snails are likely some sort of trochid snail, though a picture of one would be nice. They do not really eat food, but algae, so the more algae you have for them to feed upon, the more you'll get. They are basically free algivores.

 

[DSR]

With regard to the Bryopsis mentioned above, what do you do with that? I bought a piece of live rock yesterday (very cool with lots of the red algea stuff). But it also looks like it has a hair. I scrubbed it a bit with a new plastic sponge and got a lot of it off, but not all. I have two bumble bee snails and a cleaner shrimp will they eat it?