Nice looking pair of yepesi you've got there. Did the previous owner or place you get them from have a rough substrate casue the ones underside looks to be irritated and a bit pink.
Whoa, I almost thought you had my ray there for a second because his underside has a spot like that in practically the same place! Though young rays typically have pinkish undersides, you might want to watch for irritation as that almost looks to like a red-pink color...
Thanks Guys, the photos were taken the day after i got them and they had an 11 hour drive from the UK to switzerland, now there not so pink!
I'll post some new pic's as soon as i can get the camera back of my GF