Weird rock tubes!

[Deiblerj]

so I noticed one of my rocks growing some large tubes under it the other day. I have a million feather dusters so thought it was just more. Only these are like a lot larger!

I took the rock out to grab a picture. Sorry for the blues. The tubes are white almost opaque. Didn’t see anything in them just not sure what they are and if I should be concerned or not.....

 

[Muttley000]

Those look like tunicates possibly

 

[Deiblerj]

Those look like tunicates possibly

Is that good or bad

 

[Muttley000]

Good if that's what they end up being.

 

[Deiblerj]

Almost looks like it could be some kind of sponge...