Geography. There are more than 100 species of glass frogs. Fleischmann's Glass Frog Close-up photo of a yellow-green frog. All. Your Holacracy Companion. The National Geographic Society is a global nonprofit organization that uses the power of science, exploration, education and storytelling to illuminate and protect the wonder of our world. The body color of these frogs is lime green while their bellies are transparent. Science has described more than 60 species of the glass frog, and experts suspect many more exist. Subjects. Meet the Glass Frog. Glass frogs are small-sized frogs and they belong to the family named Centrolenidae. Use GlassFrog to evolve your management structure and future-proof your organization. Grades. Twitter; Facebook; Pinterest; Google Classroom; Email; Print; Credits Media Credits. Animal Pictures and Facts Learn all you wanted to know about animals with pictures, videos, facts, news, and more. Glass frogs are stream-dwelling and arboreal species. In glass frogs the viscera are visible, and an observer can see the heart pumping blood into the arteries and food moving through the gut. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. Glass frog, (family Centrolenidae), any of a group of tree frogs found in the New World tropics, some species of which have translucent bellies and chests. Composite photograph by Joel Sartore, National Geographic Photo Ark They vary in size, with a few larger species reaching 3 inches in length. They look similar to some of the species of tree frogs and green frogs. The glass frogs are frogs of 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 and translucent.The internal viscera, including the heart, liver, and gastrointestinal tract, are visible through the skin, hence the common name is given as glass frog.