Hi Giorgos,
sorry that I've seen the replie not earlier.
About Rays u can get allot of informations on -
www.freshwaterstingray.nl (english too)
and
www.potamotrygon.de or potamotrygon.eu
My pictures I have all on my Computer in Germany.
Perhaps I can post some I have upload somewhere else.
But if anyone has questions, I will answer
