Turbo snail hitchhiker ID help

[seacapt]

I assume these are swimming anemones - they came along with some turbo snails. I am wondering if anyone has any experience with these cute critters. I give up trying to upload a video in mp4 format - it won't work but has anyone seen a fast swimming anemone on snails before?

 

[seacapt]

Turbo snail hitchhiker picture

Turbo snail hitchhiker picture

Here is a picture of the hitchhiker - I think is a swimming anemone

 

[rudy.guzman.925]

You sure it's not this? Zoanthid spider


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[AlSimmons]

Maybe a Hydroid of some sort?

 

[seacapt]

It is clearly not an arthropod. It has tentacles and swims with them. I’m sorry the video won’t play but the tentacles move from straight out to straight back every second thereabouts. It is swimming and fastball Pycnogonida are very slow and have jointed appendages - totally different body plan. It’s got to be an anemone.