Transparent Jellyfish

Jellyfish are free-swimming members of the phylum Cnidaria. They are found in every ocean, from the surface to the deep sea. Many jellies are so transparent that they are almost impossible to see. The one above is from the Arctapodema genus, with a size of an inch-long (2.5-centimeter-long). (Photo by Bill Curtsinger)

See Through Butterflies

These butterflies are known as Greta Oto and are members of the clearwing clade. Due to their beautiful transparent wings, they are also called glasswing or espejitos (“little mirrors”).