Hello:
Plica plica and Plica umbrina are the two species I have seen most commonly. You should be able to find photos on the net plugging in the names.
In my experience these guys seem to be a little on the difficult side to keep though not impossible. I've noticed that they prefer much smaller food items than one might think. They also like a lot of natural cover and vertical perching sites to make it more like their natural habitat.
Have a Great Day!!!