anemone poop

I got this anemone yesterday and he seems to be doing really well. He has stayed open since I got him and has found a spot that he seems to like. This morning I noticed that he appears to have something on his foot. I have no idea what it is but assume it may just be poop? Can someone please...

Just wondering if it’s pooping, kind of looks like my gha but mouth is open so not 100% sure