is there water in my board?

hey guys,
I'm planning on buying this second hand fish, but it seems to me that the board is a bit yellowish before the center fin... water or not?
what do you think about this?
http://www.pixagogo.com/9949854183

I'm planning on buying this second hand fish, but it seems to me that the board is a bit yellowish before the center fin... water or not?
what do you think about this?
http://www.pixagogo.com/9949854183