This looks like a super thin spider!

[Erink]

I can see 5 legs, about 1mm each. They're all coming from the same place in the rock. I think striped legs but can't really tell. I think it's eating the mushroom in the pic. They are over the rock. Yes, they are definitely alive. I can tell by the way it's moving it's legs.

 

[F i s h y]

Probably a spaghetti worm

 

[JosephM]

+1^^^
Actually discovered a couple in my tank the other night. Good cuc to have

 

[Sarcazian]

Probably a spaghetti worm

Yup, spaghetti worm and they are fun to watch!

 

[Erink]

Will it bug my coral? It's always touching my mushroom.

 

[king aiptasia]

no

Will it bug my coral? It's always touching my mushroom.