Hitchhiker on my hitchhiker

punkieg0

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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?

534AA5D0-55DB-41AC-8700-242B8B6F03DD.jpeg E9E9F4DF-5C05-4040-ADE8-97E14C6F2949.jpeg
 

Mastiffsrule

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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.
 

ScottR

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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.
 
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punkieg0

punkieg0

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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

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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

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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?
 
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punkieg0

punkieg0

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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!
 
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