Invasive plant? Algae? What is it?

[TexasAquarist]

Hello friends! I have scoured the internet and come up short on finding an answer. So I’ll ask here!

Anybody have a clue on what this unwanted plant is in my tank? It’s sort of everywhere, but being dark and having dark gravel means it isn’t an incredible eyesore. 

My first guess is the fact that I used found driftwood from the nature preserve in this tank about a year and a half ago, and it might have interred the tank then. 
 

Any help would be so great! 

[Patrick_G]

My first guess was staghorn algae, but then I realized that it has leaves. Maybe a very small type of Ludwigia? 

[Tihshho]

Looks almost like a brown version of Calogossa (aka Red Coral Moss) 

[AndreaW]

I swear I've seen that somewhere on the forum earlier today.... now where? I'm off hunting...

Scroll down to December 31st:

@TheDukeAnumber1 ~ Is this like the colony of bryozoan you discovered on your heater?

[TheDukeAnumber1]

Its leaf like structures and appearance to have a kind of stem makes me think not bryozoan. I've only ever seen my bryozoan grow like in my photo and in small lump like colonies on the substrate.

[Minanora]

On 5/5/2022 at 3:14 PM, Tihshho said:

Looks almost like a brown version of Calogossa (aka Red Coral Moss) 

I agree that it looks like a type of moss. I've seen lots of mosses recently and done a bunch of research... I wouldn't be able to tell you what kind of moss it is... but my vote is moss.