What is this algae?

[salty joe]

I copied and pasted this. What kind of algae is it? I have a little bit growing in my tank.

 

[sunken3]

mermaids cup

 

[sunken3]

mermaids cup

https://www.kpaquatics.com/wp-content/uploads/2020/10/Mermaids-Wineglass.jpg

mermaids wine glass (for the adults)...

 

[salty joe]

I only have a few but does it tend to be invasive?

 

[sunken3]

i dont think so.. I think i'd worry more about the vine above.. some sort of caulerpa?

 

[AlgaeBarn]

like others have mentioned it is mermaid's cup/wine glass and isn't usually consider invasive and is more of a rarer algae to see in the hobby recently

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[salty joe]

My tank has been running for five years or so and this is the first I saw it. Just a few strands near the surface. I lifted that pic from online.

 

[sunken3]

crazy.. i just had some caulerpa pop up in one of my tanks that hasn't had any algae added ever.. a few coral frags over the last month... with no visible algae... must of had some dormant spores or something. I have also had corals lost in fallen cracks and such that have hung on for years to make a comeback when i do some tank re-org...