What is this???

[hominniebits]

Couple of month old 90 gal. I do not think I saw this thing there yesterday, but I didn't really look at the tank much. Today I see this. I have a flashlight on it to see it better. Looks like a little mouth in the one branch. Have to click

Any ideas? Good? Bad? Thanks in advance.

 

[glb]

I couldn’t open the video.