Help! ID please

[Joel_155]

Anyone know what this is? Sorry about the bad cellphone picture. Im curious what the small protrusions with small string like stuff coming out od them.


http://i1198.photobucket.com/albums/aa446/joele_6817w/2012-10-17_17-56-04_560.jpg

[Acronic]

Vermetid snails

[Joel_155]

Anything to worry about?

[Acronic]

They can become a nuisance if populations grow to large numbers. Their web irritates corals from contact. They feed on suspended particulate matter. no need to lose sleep over them though