Well, it seems like the acro which I thought as "Red Dragon" is not. Its actually Mr. Pacman (red body with greenish tip and green polyp). Thanks to Stanley for the initial suggestion and Dave for pointing out that red dragons have white polyps. Here's a picture for reference. I don't know why my camera cannot catch the green better. The tips which is appearing white is either growth or green.
DSC_9404 by
md. raied, on Flickr