Hitchhiker Question

[drag]

heres the deal, i find these little guys under my rock. any time i turn over a rock that has its bottom on the aragonite. these little cridders scatter around ther about 1/8" to 3/8"of an inch. there white and kind of resemble small worms. i had these guys forever just wanted to know what they are..

they dont look like bristleworms.

 

[Mr Miagi]

Sorry drag, there are thousands of species of Annelids, so a positive ID is going to be very hard. Is a pic possible?

How long are they? Are they on substrate or LR? Are they in a tube or are they free swimming?

 

[drag]

there on the bottoms of rocks. they crawl not swim.
not looking for a positive id just to know there not a threat to anything or hell maybe there good?

 

[Aquascaper]

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Xtalworld