hitchikers to identify please.

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I am wondering if anyone has a clue as to what i have growing here... on the left is like a little patch of circles, and the right is well i dont have a clue. any ideas?

heres a side view of the reddish/orange thing from the right...

and another patch of circles on a rock in the back...

any ideas?
All three appear to be corals...i have many of those things on my LR, and they grew and grew, trust me, the last one i am almost posilitve it is a coral, i cannto think of what kind at the mment, but the other two, i am not toally sure, it looks like a acro of some sort, but dont take my advice to heart right away....lol