Are there worms that burrow through live rock?

[alcimedes]

Recently was breaking down a reef tank, and found this odd worm like critter. It appears to bore through the live rock to make it's tunnels and pathways. I did a google search but nothing I found seemed like a match at all.

Just wondering if anyone knows what this is?

 

[alcimedes]

Looks like some kind of peanut worm. There are many kinds.

interesting. didn't realize they can eat through rock, but it sounds like they can. Thank you!

 

[Sugar Magnolia]

Great article! Have a look. Peanut Worms in the Reef Aquarium | Reef Builders | The Reef and Saltwater Aquarium Blog