Worm or something that dug a tunnel under rock?

[Brah02]

I just noticed a rock has a tunnel/cave dug under it, and I thought it was my pistol shrimp that I added a while ago and haven't seen since, but I just shined a light in and it looks to be some sort of worm. What worms will burrow under rock? Tried to capture a video but the tunnel is too dark to show up on my video. looks to have long whiskers on its head.

 

[Crabs McJones]

Hard to tell without a pic, could be a bristle worm, dorvilladae worm, bobbit worm. Will need a pic to identify

 

[20gallonreefer000]

Maybe Medusa worm? Bobbit?

 

[Brah02]

Ok, now I don’t think it’s a worm, but multiple creatures of some sort. Here’s a quick video… maybe large amphipods?

 

[Crabs McJones]

Amphipods

 

[Brah02]

Amphipods

Did the video work? It’s blank on my screen. There’s a pretty nice Scoly next to the cave, will large amohipods harm coral? Or a tube anemone?

 

[Crabs McJones]

Yup video loaded for me just fine. They shouldn't bother the scoly