My best ID for this one is maaaybe Acropora speciosa? The growth is much thicker than say A. carduus:
Another guess, but I'm more confident with this one being Acropora derawanensis or possibly A. elegans. Very horizontal growth pattern, extremely easy to break, and very fine tips:
![30733737172_f3465ca9b9_c.jpg](/proxy.php?image=https%3A%2F%2Fc1.staticflickr.com%2F6%2F5826%2F30733737172_f3465ca9b9_c.jpg&hash=93099f61c9450efcea262c6f4fa7b7e7)
Another guess, but I'm more confident with this one being Acropora derawanensis or possibly A. elegans. Very horizontal growth pattern, extremely easy to break, and very fine tips:
![30733735642_9c94b40aa4_c.jpg](/proxy.php?image=https%3A%2F%2Fc1.staticflickr.com%2F6%2F5818%2F30733735642_9c94b40aa4_c.jpg&hash=96e0946df629be85e7119d7c83ea6a4d)