Orange - Maybe sponges ?

[tarmer]

Good Evening all - Thanks for the mushroom ID yesterday- When I got this colony I could not see everything as the mushrooms cover all of the rubble during the day - but as they recede a little at night I can see this orange material on the rocks - when looking close it looks like it is a sponge type material under the mushrooms- I am not concerned by it just curious as to what it may be

Any help would be greatly appreciated

 

[Lavey29]

Hard to tell in the pics but I have huge orange sponges on my rocks under corals like zoas they even have tentacles. Hasn't been an issue though.