What are these?

[JenniferMcK]

These little things have just gotten bigger during the last week or so. What are these? And are they good or bad?

 

[Crabs McJones]

Are they hard or squishy? And do they move at all?

 

[JenniferMcK]

Are they hard or squishy? And do they move at all?

Not sure about the texture but they do move quite a bit

 

[Crabs McJones]

HMM, @KJ any ideas?

 

[Gareth elliott]

Spionid?

 

[KJ]

Resemble spionid worm. https://www.google.com/search?q=Cha...gB#safe=off&tbm=isch&q=Chaetopterid+-+Spionid

 

[Brad Miller]

Wow, they look like part of the rock work...amazing little things, never saw them yet

 

[JenniferMcK]

Resemble spionid worm. https://www.google.com/search?q=Cha...gB#safe=off&tbm=isch&q=Chaetopterid+-+Spionid

They kinda look like that but are bigger. In the last picture, that tube thing has a bulb that's in the rock work at the end. In the first picture, the tube has a frayed edge which I though maybe was a feather duster, but it's not. I have many feather duster in the rocks and they look nothing alike

 

[Rybren]

Take a look at vermitid snails.

 

[JenniferMcK]

Take a look at vermitid snails.

They look nothing like that I don't think

 

[Rybren]

Do you see something like spider webs ever coming out of the tubes?

 

[lapin]

You have 3 pictures #1 and 3 look similar. In them I see a projection that looks like a rock tube. This is most likely a tube worm of some sorts that has a calcareous tube. If you did not start with live rock them it is most likely a worm in my opinion. Because yours does not have a spiral shell attached to the rock that I can see I do not think it is a vermitid snail. But if it does it is a snail

Picture # 2 looks very different. This can also be a tube worm. I have the ones with smooth tubes in my tank. You bought fancy ones called feather dusters.
It could also be some sort of sponge like a vase sponge but highly unlikely.
https://reefguide.org/pixhtml/branchingvase3.html

 

[JenniferMcK]

Do you see something like spider webs ever coming out of the tubes?

No nothing comes out of them to my knowledge.

 

[JenniferMcK]

You have 3 pictures #1 and 3 look similar. In them I see a projection that looks like a rock tube. This is most likely a tube worm of some sorts that has a calcareous tube. If you did not start with live rock them it is most likely a worm in my opinion. Because yours does not have a spiral shell attached to the rock that I can see I do not think it is a vermitid snail. But if it does it is a snail

Picture # 2 looks very different. This can also be a tube worm. I have the ones with smooth tubes in my tank. You bought fancy ones called feather dusters.
It could also be some sort of sponge like a vase sponge but highly unlikely.
https://reefguide.org/pixhtml/branchingvase3.html

I bought the rocks from kpaquatics so they are live straight from the ocean so there's all kinds of possibilities of what they can be. I haven't added anything to the tank other than a cleaner shrimp, a few snails, and a few hermits. Everything else hitchhiker. I have hundreds of feather duster and some colonial turnicates in there. I think you right about the being tube worms though upon googling the vase sponge, my little tubes do resemble them alot. They're kinda neat looking and the tube move around quite a bit.