I had to park this picture here as one of those times you know you'll likely not re-live later. Holding a massive colony before it has a chance to break up into smaller chunks was a fun time. Plus it puts into perspective the size of the colonies that had grown in my 400g reef over a 3.5 year period.
This is an Orange Ball Anemone, supersized with a macro lens. Usually they are about 3/8" in diameter from tip to tip. This was a bigger one, maybe 3/4" in diameter. I have them throughout all my tanks, and they are opportunistic filter feeders. I think they are quite pretty, and study the rockwork after lights out with a flashlight to find these little guys wide open. During the daytime I hardly see any.
These fat corals are Dendros, or Dendrophyllia to be exact. And they look incredible with a macro lens. Open during the day time, they are hungry looking for food while absorbing some photosynthetic magic as well. Look at the texture of each tentacle.