Worm found under rocks in the Keys

[designbysue]

I found several of these under rocks while diving with Conch Republic Divers in the Keys. Any idea of what they are?

http://www.designbysue.com/gallery/d/23120-1/IMG_1687.jpg

http://www.designbysue.com/gallery/d/23118-1/IMG_1686.jpg

http://www.designbysue.com/gallery/d/23109-1/IMG_1679.jpg

Thanks is advance

[ddeborahdelamar]

Looks like a medusa worm to me. I don't know enough about them to ID the family or species...

[AquaExplorer]

Kewl!

[designbysue]

Medusa worm looks correct - thanks!