What is this black spots?

[Blmain]

Can anyone figure out what this is?

 

[Lionfish Lair]

Can you remove it to a container with water and perhaps try for another picture.

 

[Blmain]

Can you remove it to a container with water and perhaps try for another picture.

Sure I will give it a try.

 

[ahiggins]

Does it look more sponge or more nudi?
I dont believe Ive seen any flatworms that color. Could it just be dead tissue?