Characteristics
Glass frogs are generally small, ranging from 3 to 7.5 centimetres (1.2 to 3.0 in) in length. The frog is known to eat its own young. They are green in color over most of their bodies, save for the skin along the lower surface of the body, which is translucent.
Glass frogs are similar in appearance to some green frogs of the genus Eleutherodactylus and to some tree frogs of the family Hylidae. However, hylid tree frogs have eyes that face to the side, whilst those of glass frogs face forward. Some species of green tree frogs (especially juveniles), such as Hyloscirtus palmeri and Hypsiboas pellucens, have the transparent abdominal skin typical of glass frogs, but they also have calcars on the heels, a character not present in any species of the family Centrolenidae.
Read more about this topic: Glass Frogs