what is this big pearl?

thank you to renstock ( renstock.deviantart.com/ ) and others who give they pictures stocks.

body's picture :

Black Trench Jacket 2
Black Trench Jacket 4
Laying down 5
Laying down 3
laying down 2
Laying down 11
laying down 1

pearl :
Sunstone72-Stock 258


I very like use they dorade for made they mermaid's tails but don't find good picture in they stocks. Finally a friends give me a picture when he go to the sea in vacation. (Yes ^^)