really hard to tell. mainly the white stiping on the camelback should give it away. where as the stripes on a peppermint are more red and translucent. no real WHITE.
http://forums.saltwaterfish.com/vb/s...melback-Shrimp.
see this link. i didnt really read it but it may help.
another link.
http://www.siamreefclub.com/forums/i...howtopic=23277