coral ? or something else

Hi! My husband and I are new to saltwater tanks, and I know absolutely nothing! I've been trying to look this up, but not even sure what to look up. Does anyone know what this is, should we be worried, should we take it out? It looks more brown in person, not so much green.

Can anybody help me identify what’s hanging out on this coral in the front? I just got it in. I know the one piece is bubble algae and I should just take it off but what’s the other stuff? Thank you!

Random and a bit of a silly one but is this a Favite coral that’s attached to one of my snails?? Just spotted the bright pink dots and it seems to be purple with the pink dots on one half of the shell. If so, is that common?? These are the best pics I could get.

I flipped a rock that’s been in my tank for a while, I was gonna take it out and put it in a new tank but saw this and want an ID on it first lol. Only coral in tank is a cabbage leather and watermelon bubble tip anemone. It doesn’t look like my cabbage leather, and it’s also not a Xenia because...

I just purchased this Balanophyllia solitary cup coral the other day and noticed it came along with this purple growth next to it. Just curious if anyone knows what it is? Definitely assuming it’s NPS Thanks

My anemone has a super big middle and I never seen it and I am not sure if it’s normal or not and if I should be concerned Again, I am not an expert and only been having my aquarium for over a year Thanks for the tips in advance

I woke up one morning and I have hundreds of these all over my reef some are even growing on some of my corals.Are they corals ? Are they good or bad for my tank?What are they? There was just an explosion of them one day!