Pix & ID: Critters that come in your rocks: the good and the bad.

[FNGsaltwater]

Regretfully, I don't have a photo yet. But I've been searching for an I.D.
I have a beautiful, huge sun coral that has a small bare spot. When originally purchased, that bare spot had a tiny spot of, what appeared to be, red coraline algae. Within weeks it has gone crazy with growth. It is red/burgundy in the daytime lights, but turns grey/Green when the dusk/dawn lights come on. Today, when I touched it to feel the texture, it changed color immediately. It's awesome, but it will consume my sun coral, I'm sure. Any help is appreciated!

 

[deputydawg88]

Any idea what this guy is and whether he's safe? I'm assuming it's some kind of sea slug or nudibranch.

And what about this guy?

I found him in my sump but he has since disappeared, no idea where to. I haven't seen him for a few days now.

Here's a video of the way it moves too: https://www.youtube.com/watch?v=27PxQgai_cE

 

[Sugar Magnolia]

Top is a harmless Elysia slug, the other is a harmless bristleworm.

 

[chris8232]

http://cloud.tapatalk.com/s/589f85fc21879/IMG_20170211_163440009.jpg

 

[AlSimmons]

http://cloud.tapatalk.com/s/589f85fc21879/IMG_20170211_163440009.jpg

It looks like you might have an Aiptasia right in the middle of that Blastomussa coral.

 

[chris8232]

That was my thought as well. Blasto will open full, all except in that area.

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[chris8232]

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[chris8232]

 

[chris8232]

Can't get my phone cam to focus at angle

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[deputydawg88]

Any idea what this fellow is? Best pic I could get unfortunately and I can't seem to find him this morning.

 

[taricha]

Any idea what this fellow is? Best pic I could get unfortunately and I can't seem to find him this morning.

nudibranch of some kind.

 

[deputydawg88]

nudibranch of some kind.

That's what I guessed. Is he a danger to my yellow star polyps?

 

[Jmm226]

Can some one help ID this thing.

http://http://s1079.photobucket.com/user/jmm226/media/1486911202151-1546752785_zps1kjue9es.jpg.html?filters[user]=146182408&filters[recent]=1&sort=1&o=0

I noticed it this morning in my live rock I thought it was a pom pom crab shed so I went to pull it out but it retracted into the rock. It looks like a baby bubble tip anemone. It is clear and brown but doesn't have long strings like aiptasia.

 

[Jmm226]

http://s1079.photobucket.com/user/jmm226/media/1486911202151-1546752785_zps1kjue9es.jpg.html?filters[user]=146182408&filters[recent]=1&sort=1&o=0

 

[PeterBel]

I would remove it! Not worth the risk. Look,like a zoa nudi, if it change color, definitely pull it out. Zoa nudi adopt the color of the coral they eat!

 

[AlSimmons]

It looks more like a montipora eating nudibranch to me, but either way it's probably not something you want in your tank.

 

[PeterBel]

It looks more like a montipora eating nudibranch to me, but either way it's probably not something you want in your tank.

I think you are right! Either way, Get it out!


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[deputydawg88]

I think you are right! Either way, Get it out!


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I would and I found it again earlier (before your first post!) but it has disappeared again. I'm new to keeping a reef tank, though it is something I have had ambitions of doing for a good 5 years now. I'm a live and let live kind of guy and don't really like the idea of killing things without reason so it's hard for me to reconcile just chucking something out of the tank! Is there anywhere I could safely move him to, where he won't cause me problems?

 

[dcom]

I bought this algae and added to my system.
Is it the Caulerpa algae mentioned in your 1st post as a bad guy?

 

[dcom]

http://imgur.com/a/BveYx