help #mushrooms

found this little guy today by accident. Came along with my pretty mushroom rock. Any idea what it is? Think it will hurt my mushrooms?

so i recently purchased some mushrooms ( a disco, and rhodi) and ive been trying to feed them but they just wont take what i givem. ive tried phytofeast, my fishes frozen food, and flakes but they wont take any of it. also trying to get my favia to eat, im fairly sure its taking some of it in vs...

I've had this mushroom now for about 8 months and the other day it started to look like it was forming two semi-circles, or from what I've witnessed in the past, about to split into two. However, now the mouth started to separate and you can see its "stomach" or mesenterial filaments. I have the...