Can somebody id what this is?

[Trefaca]

Hello so I have this thing in the tank since almost begging and I have no clue what it is there was one other place where same looking guy appeared. It only sticks it's tentacles looking things and retracts doesn't so anything else so can somebody id this guy please?

 

[Trefaca]

It has like white little tentacles sticking in and out. Sorry I wasn't really specific where to look

 

[landlubber]

I honestly still don't know if i'm looking at the right thing but I think I see a vermetid snail. look into them and if so often the fix is just snapping off the tube its made its home in and glue it off.

 

[Trefaca]

I honestly still don't know if i'm looking at the right thing but I think I see a vermetid snail. look into them and if so often the fix is just snapping off the tube its made its home in and glue it off.

There is no tube this guy is sticking out of the hole that looks like it's covered by like white webbing or some tissue

 

[landlubber]

There is no tube this guy is sticking out of the hole that looks like it's covered by like white webbing or some tissue

my bad i'd missed the video and thought it was just a preview window. To me that looks like a small brittle starfish's legs but i've never had one in my display so others opinions might be helpful

 

[Trefaca]

my bad i'd missed the video and thought it was just a preview window. To me that looks like a small brittle starfish's legs but i've never had one in my display so others opinions might be helpful

Yeah I was thinking that it might be the case because when I set the tank up put the rock in there was a teeny tiny one but then she disappeared and I haven't seen her ever again out. But it's been now two months since the tank is running and that's all it does sticks it's "legs" in and out in that specific spot since then

 

[Tahoe61]

Brittle Star. That type will not get much larger and is harmless.

 

[rayadog]

^

 

[Trefaca]

Thank you for your answers