Id on this plz in the middle?

[loweryphil]

Zoas open up all around it so hard for a clear picture.

 

[nautical_nathaniel]

Does whatever it is move around? Any way you can take it out of the water and take a closer picture?

 

[loweryphil]

I only noticed it today, my zoas all open up which makes it hard to reach.

 

[cloak]

How does it feel to the touch, hard or soft? If I had to guess from that picture alone I would probably go with a sponge of some sort.

 

[loweryphil]

Soft. Stays put in the same spot