ID please, aiptasia and... not a clue ?

[Sasquatchv]

I bought some cycled rock from LFS's sump.
I have some tiny hitchhikers:
that one is approx 3mm across, fully retracts into the base:

that one(same spieces?) is 4 mm across, also fully retracts ino the base.


and mysterious red claw poping in and out, spiral tube is 1.5-2mm in diameter:

 

[WheatToast]

1. Harmless, filter-feeding tube worm (Serpulidae)
2. Might be a very large and rare variety of vermetid snail, but it’s hard to tell from the photo. They’re not always purple and pinhead-sized.

 

[NoohpyT]

1. Harmless, filter-feeding tube worm (Serpulidae)
2. Might be a very large and rare variety of vermetid snail, but it’s hard to tell from the photo. They’re not always purple and pinhead-sized.

+1

First two images are some kind of feather duster worm

the 3rd image looks to be a type of vermetid snail

 

[Sasquatchv]

Thanks, I guess it's super glue time for the snail...

 

[khuchting724]

I bought some cycled rock from LFS's sump.
I have some tiny hitchhikers:
that one is approx 3mm across, fully retracts into the base:

that one(same spieces?) is 4 mm across, also fully retracts ino the base.


and mysterious red claw poping in and out, spiral tube is 1.5-2mm in diameter:

Definite feather duster for first two pictures!