What’s this?

[DHill6]

Anyone know what this is? Just noticed today, I’m guessing it’s an algae? Stringy off white looking thing both wrapping itself through rock and a large clump under rock which reflects on mirrored bottom of tank. Picture 1 it’s to the right, picture 2 it’s under rock mid picture. Thanks in advance for any input.

 

[DHill6]

 

[DHill6]

Sorry about the double post of same picture, there was a problem downloading the picture.

 

[reef lover]

Sponges

 

[saltyfilmfolks]

Yep. Sponges