What is this? Macroalgea? Algea? Pest?

olavvk

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Hi, anyone knows what this red part is?

IMG_7644.jpeg IMG_7643.jpeg
 

twentyleagues

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I dont think its red grape algae, which would be "good"/desirable. It may be red bubble algae, technically undesirable but some people like bubble algae. Either way, need a more clear close up. There are a few red algae's that look like that....sort of. I am leaning towards bubble algae.
 

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