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

[justinr2k]

Looks like a xanthid species. They are very destructive in a reef tank as they grow. They will eat snails, hermits, some corals and small fish.

Thanks. Guess I'll have crab for dinner.

Do you guys keep any emerald crabs in your main display? I have one and so far he's been good. Any bad experiences with them?

 

[SuperNiketas]

Discovered this starfish hitchhiker today. Excuse the bad pic, but, can anyone Id? He's got two arms missing but they regrow, right?

 

[bart2546]

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

If I could please get an ID on this crab that would be great. He apparently was a hitch hiker on either my new conch or has not bothered to come out of my live rock for some time until now. Sorry I couldn't get a better out and about pic, he kept burrowing further into the sand. Thank you!

 

[SuperNiketas]

If I could please get an ID on this crab that would be great. He apparently was a hitch hiker on either my new conch or has not bothered to come out of my live rock for some time until now. Sorry I couldn't get a better out and about pic, he kept burrowing further into the sand. Thank you!

Perhaps a Spider Decorator?

 

[justinr2k]

Let me try again...

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A kind of leather is all I see. Maybe a cabbage leather?

 

[LisadaleNJ]

I think I had a few hitch hikers in my live rock. One looks like a small brittle sea star, has six legs and hides in the crevices of rocks. I also see some small tube worms, and the latest was some worm-like "thing" that just came out of a rock and just kept getting longer and longer until he disappeared. Weird. I am just hoping none of these are harmful to my tank.

 

[friedwilly]

Live Rock Critter

Live Rock Critter

I found this little critter in my Live Rock that I am storing for my 60 Gallon Cube build.

Could some one help me ID this critter and tell me friend or foe?

 

[justinr2k]

I found this little critter in my Live Rock that I am storing for my 60 Gallon Cube build.

Could some one help me ID this critter and tell me friend or foe?

Looks like a bristle worm. Harmless.

 

[supervdl]

I found this little critter in my Live Rock that I am storing for my 60 Gallon Cube build.

Could some one help me ID this critter and tell me friend or foe?

Bristle worm. harmless.

 

[MaskedRogue]

So, I spotted this on one of my live rocks. It looks like a hardened bubble or something. I tried to get a good picture of it, but where it is on the underside of the rock I have to shine a flashlight to really see it.

Any ideas?

 

[justinr2k]

So, I spotted this on one of my live rocks. It looks like a hardened bubble or something. I tried to get a good picture of it, but where it is on the underside of the rock I have to shine a flashlight to really see it.

Any ideas?

Looks like green bubble algae. Get it out asap!

Remove the rock and pluck it off as best as you can. I'm not sure if treating the area with anything would be beneficial.

 

[MaskedRogue]

Also found this. It has definitely moved from the first time I saw it. Baby starfish? It's above the turbo snail in the white stuff.

 

[Sugar Magnolia]

Hard to tell, but I'm going with asterina starfish.

 

[jonesdeini]

Noticed this weird tunnel in the sand this morning.

There is definitely something inside of it.

http://imgur.com/a/tFd44

Thanks for your help!

 

[steeb]

I noticed this last week. Wasn't sure what it was. I snapped a pic on 4/14 to monitor its growth. It has gotten bigger.

 

[cloak]

Just a harmless sponge. No worries.

 

[steeb]

Just a harmless sponge. No worries.

Any idea on how he got there?

 

[swiss1939]

hydroids?

hydroids?

Just wondering if these are digitate hydroids or spinoid worms or something else?

There is a longer one that sticks out of the rock to the left and actively extends waves around its hole when I turn the powerhead off.

My tank is starting 3rd week of cycle and am starting to see some hydroid jellyfish on the glass as well as some tiny red tree stump looking things with worm heads sticking out so I'm not sure if these white beard trim stubble looking things are something I should wipe out now before my cycle completes.

 

[swiss1939]

you can also see the red tree stump things on the left rock at the cave opening. Any idea what these things are?

 

[cloak]

Those small red things are Foraminiferans most likely. (harmless)