What is this on my snail

[Lucastank]

Just got a CUC yesterday - saw this in one of the snails, can you ID and let me know if action is needed, thanks everyone

 

[blaxsun]

It looks like algae...?

 

[TheReefDiary]

Just got a CUC yesterday - saw this in one of the snails, can you ID and let me know if action is needed, thanks everyone

some algae. grows on snails all the time. if you want clean the shell for him. my other snails often just clean each other's shells. it's fun to watch.