Cup Coral (turbinaria)

[mark]

Got a Cup Coral about a week ago. It's placed on the floor of the tank and sits between 2x250W MH. Tank gets 30+ times flow and would say is placed in a low-moderate area. Picture was taken about 2 hours after the MH go off and under 2x54W T5 actinics. I'm getting slight polyp extension but nothing like shown in this peltata (http://www.reef-encounters.com/Livestock%20subpages/LPS%20coral%20pages/greenturbinaria.htm) (more like this reniformis (http://www2.aims.gov.au/coralsearch/html/301-400/Species%20pages/358.htm) (fourth pic) but don't think that's what I have)

Though first link is T. Peltata, should I be expecting more from mine, if so how?
http://i67.photobucket.com/albums/h316/das75/turbinaria.jpg

[mark]

Here's full picture. T frondes or T reniformis?

http://i67.photobucket.com/albums/h316/das75/cup.jpg

[Doug]

I would say its a reniformis. Peltata or pagoda coral, is more of a closed shape. My reniformis is a different shape than yours but perhaps as its still smaller.

I once had a large colony, that was similar to the picture.