Not sure what this is

[beansandmia]

Anyone know what this is? I seen it wrapped around a rock, I tugged it out, it shrinks to about an inch or so then when it thinks it's safe he pops out so to speak.....I have him out of the tank until I know what it is...ewwww...

http://i172.photobucket.com/albums/w15/beansandmia/saltwaterworm.jpg

[Shawnts106]

Peanut worm, and your in the wrong forum!!! haha