Bizarre facts-Transparent living beings

Transparent FrogNative to Venezuela, the Glass Frogs belong to the amphibian family Centrolenidae (order Anura). While the general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is transparent, so that the heart, liver, and digestive tract are visible through their translucent skin. (Photo by Heidi and Hans-Jurgen Koch)