HELP - WHAT IS THIS??

[BlastedReefer]

Can someone please tell me what this dark green growth on my live rock is? I'm thinking some kind of algae maybe?

Thanks in advance!

 

[KJ]

Codium vermilara. @saltyfilmfolks

 

[Crabs McJones]

Looks like codium algae, its a type of macro algae

 

[P-Dub]

Looks like Codium, aka dead mans fingers.

 

[malacoda]

Yep, Codium. One of the easier macro algaes to keep. Few if any fish/critters eat it. Middle-of-the-road in terms of nutrient uptake. Good place for pods to take shelter. And it will need to be pruned back from time to time or it will eventually (e.g. sloowwwly) take over the tank.

I always keep a bit in my display tank. Adds a nice touch of diversity to a tank full of coral and is a bit underrated IMHO.