Algae ID on snail

[encrustingacro]

What is this algae on my snail? Before you say it’s cyano, it doesn’t come off when I squirt water at it.

 

[Timfish]

Can you get a better picture? It's hard to see exactly what you're asking about. It looks to me like some coraline algae as well some red wire algae (Gelidiopsis spp.).