Glass Frogs (Centrolenidae Hyalinobatrachium) have pigment-less skin that allows their internal organs to be seen clearly. Related posts (automatically generated): Glass Squid Okay. I was wrong. This is the stupidest-looking animal ever…. Skin art Artist Ariana Russel suffers from dermatographia which causes the skin… VeinViewer The VeinViewer is a medical device that uses infrared light…