What is this?

[MrPufferSnowflake]

I’ve had this algae stuff attaching to rocks and what not. Not sure what it is. Looks like white or almost clear branches coming from rocks and sometimes on glass

 

[reef lover]

Clear makes me think sponge of some sort. But pics too blue to see....

 

[MrPufferSnowflake]

Clear makes me think sponge of some sort. But pics too blue to see....