Help me identify what this is?

[Eric.jones1996]

Hey all, so I’ve been seeing these things in my seahorse tank for about a month, I think they were introduced when I added a big piece of macro algae. Sometimes they are on the rock and sometimes on the glass, I’ve never seen them move, but every day they are in a different spot. They are all bunched up and when you pull one part it’s like a super long worm? Any help we would be appreciated.

 

[damsels are not mean]

kinda looks like eggs