Sponge-like with hole attached to base of Elegance

[NB Reefer]

I found this soft sponge-like thing attached to the base of an elegance. I only saw it when I changed flow and it lifted the part of the elegance up. There seemed to be two holes or entrance/exists in it, one pictured. I did remove it incase it was harmful. Thoughts on what it is?

 

[Oscaror]

I found this soft sponge-like thing attached to the base of an elegance. I only saw it when I changed flow and it lifted the part of the elegance up. There seemed to be two holes or entrance/exists in it, one pictured. I did remove it incase it was harmful. Thoughts on what it is?

Like you said, looks like a sponge

 

[NB Reefer]

Even with the larger hole in it? Looks like something may have come out of ? Like a cocoon of sorts.

 

[Oscaror]

Even with the larger hole in it? Looks like something may have come out of ? Like a cocoon of sorts.

Sponges have varying hole sizes