Hitchhiker on my hitchhiker

[punkieg0]

I have live rock that I ordered and it’s been in my tank with my fish for a while. The 2 clams in these photos have some stuff growing on them and I am trying to identify what they are. 1 clam is still alive and the other didn’t make it with the rock but we kept the shell.
1 has red stuff coming from it and the other is brown-almost looks like cup coral?

 

[Mastiffsrule]

Evening

Sorry for the delay

I am guessing the top is a form of hair algae
The bottom appears to be cyano. Neither super desirable

Depending on how long a while is, I may take that rock out. If able, at minimum pull it out for a good cleaning.

 

[Bfragale]

The top I don’t think is hair algae. Come kind of coral?

 

[Thespammailaccount]

First one is some kind or coral second looks like red bubble algae

 

[ScottR]

First one is a kind of cup coral - I forget it’s true name. Cup coral is synonymous with a few other corals. Second is red bubble algae.

 

[punkieg0]

The red is some kind of macro algae - my sailfin blenny snacks on it which is good. I also think the other is some kind of coral. Guess I’ll just have to wait it out and see

 

[Normandy601]

looks like Botryocladia aka red grape caulerpa. Pretty until it goes asexual and covers your ENTIRE rockwork! Reef flux was the only thing I found to kill the stuff off permanently.

 

[minus9]

I see three different things here, first is a cup coral or galaxea, depends on location, second is red macro algae and third , an orange sponge. Is this Caribbean rock or rock from the Gulf?

 

[punkieg0]

I see three different things here, first is a cup coral or galaxea, depends on location, second is red macro algae and third , an orange sponge. Is this Caribbean rock or rock from the Gulf?

Rock from the gulf!

 

[minus9]

Montastraea cavernosa most likely.