Here's quite a nice writeup on some common corals, includes lots of info:
For example:
Bubble Coral
Photo by: Valetta Clements
Scientific Name
Plerogyra (PLEH-ro-JAI-ruh)
Common Names
Bubble, Grape, Octobubble
Region
Red Sea, Indian to central Pacific Ocean Regions
Lighting
Moderate to High, maintains in lower light conditions but the same amount of growth will not be observed.
Aggressiveness
Very aggressive, needs adequate room in the aquarium for growth. P. sinuosa (pictured at left) extends only 1" to 2" sweeper tentacles at night or when feeding whereas P. simplex can extend sweepers up to 6" or more.
Current
Low to Moderate. Under high current conditions this coral will not extend to it's full capacity. High currents can tear the tissue away from the skeleton causing necropsy and many times death. Will expand dramatically in low current conditions.
Hardiness
Excellent. Good for beginners with large enough aquariums to house this very fast growing species. They have been known to double or even triple in size (with good water conditions) in only a few months time. The coral pictured here was the size of a fifty cent piece when fully expanded when it was purchased a little over a year ago. It is now approx. 6" in diameter when expanded.
Placement
Low to Middle regions, not directly under halides.
Valetta Clements