What is This grey web on my substrate?

[Cannons Fish]

I came home today and found this thing on my substrate that looks like a spider web, does anyone know what this is. I don't know how well you can see it in the video.

 

[susan ingram]

What type of snails do you have if any? Does it stay in the same place? Could be you are getting ready to have snail babies... going to bump this, cuz i am not sure.

 

[Cannons Fish]

What type of snails do you have if any? Does it stay in the same place? Could be you are getting ready to have snail babies... going to bump this, cuz i am not sure.

I have a couple astraea snails. I woke up this morning and it was gone so don't know for sure what it was but nothing happened. It just disappeared

 

[susan ingram]

Glad it gone!!

 

[A sea K]

Any chance you have a rabbit fish? They will shed their slime coat and it can lay on the bottom like that till it dissipates.