Whilst the clown in the picture does look like it has something wrong with it's mouth, without a close up photo I wouldn't be too quick to diagnose. My clown had a similar looking mouth, which I put down to bruising from chucking my corals around. It's healed up fine and she's still alive 12 months on.
And FSN is right, those polyps will spread nicely around your tank. Youcould also place some smaller rocks near them to encourage them to grow onto them and then sell them on yourself