Interesting critter - what is it?

[Tanker Bob]

Need some help IDing this guy please. Saw this guy today. There is a very long feeler(?) that is coming out of the white spec at the top. The white line moved around and the "reeled" completely in to the white dot. I have no clue. Good or bad? I had heard from my LFS that there are some corals that have these long feelers and come out at night.

 

[Ron Reefman]

maybe a better photo?

 

[olonmv]

Good tip given to me yesterday, blues down whites slightly up for ID pics.

 

[stanleo]

digitate hydroid would be my guess without a better picture

 

[StlSalt]

I'll guess it's a vermited snail. Can't really tell without a clearer picture.

 

[Tanker Bob]

digitate hydroid would be my guess without a better picture

After looking up digitate hydroid that looks like an exact match. Thank you! Can they hitchhike on new corals?

 

[stanleo]

After looking up digitate hydroid that looks like an exact match. Thank you! Can they hitchhike on new corals?

My understanding is they hitchhike on anything.