Any idea what this is?

[mbarber87]

This is starting to pop up all over my tank. It grows on the walls and some rock but it almost looks like it’s branching.
Also it’s much harder to get off compared to the rest of the junk I clean up.

 

[mbarber87]

Bump. Anyone?

 

[Neoalchemist]

Might be hydriods. Hard to tell. Need better picture.
If its hydriods they are bad and they sting but they usually die out in a short period of time unless you are feeding a lot of small particle filter food. They are not an algea. I believe they are closely related to jellyfish.

 

[TheShrimpNibbler]

They look like hydroids.