Growing on my snail

[beachguy213]

Looked in sump today and saw this growing on my snail. Any idea what it is. I am still. New to reefing. Hope this is not something bad.

 

[ISpeakForTheSeas]

Acetabularia sp. - Mermaid’s Cup algae.

 

[beachguy213]

Acetabularia sp. - Mermaid’s Cup algae.

Thank you so much