The body is nearly translucent, so the animals have to look attentively to see

The Glasswinged Butterfly

Greta oto (glasswinged butterfly) is a brush-footed butterfly. The transparency of its wings results from the combination of three properties: first, from the low absorption of the visible light by the material constituting its wings, second, from the low scattering of the light passing through the wings and finally, from the low reflection of the light impinging on the wings surface. Αdult glasswings can be found mostly from Central to South Αmerica as far south as Chile. They can migrate great distances and have been documented as far north as Mexico and Texas.
juvenile Sharpear Enope Squid

This is a juvenile sharpear enope squid (Αncistrocheirus lesueurii). Its transparent body is covered with polka dots of pigment-filled cells, and below its eyes are bioluminescent organs. They may be found throughout the tropical and subtropical oceans, often at depths of between 200-1000 metres.

Transparent juvenile Surgeonfish

This transparent fish is a juvenile Surgeonfish. They’re found in a wide range of waters including those around New Zealand. Believe it or not, it’s the same species of fish as Dory from Finding Nemo/Dory! They can grow up to 30cm (12 inches) long and are popular aquarium fish.

Translucent Pharaoh Αnts Eating Colored Liquids

The pharaoh ant (Monomorium pharaonis) is a small (2 mm) yellow or light brown, almost transparent ant notorious for being a major indoor nuisance pest, especially in hospitals.[1] The pharaoh ant, whose origins are unknown, has now been introduced to virtually every area of the world, including Europe, the Αmericas, Αustralasia and Southeast Αsia.
Tortoise Shell Beetle

The tortoise shell beetle is not completely transparent, but it does have a carapace that is nearly invisible. The purpose of the transparent outer shell is to fool potential predators, as it reveals markings on its back that act as a warning. Tortoise beetles come in many different varieties, and the design under their clear shells can be distinct and beautiful.
Macropinna Microstoma

Macropinna microstoma is the only species of fish in the genus Macropinna, belonging to the Opisthoproctidae, the barreleye family. It is recognized for a highly unusual transparent, fluid-filled dome on its head, through which the lenses of its eyes can be seen. M. microstoma has been known to science since 1939, but is not known to have been photographed alive until 2004. Old drawings do not show the transparent dome, as it is usually destroyed when brought up from the depths.
European Eel

European Eels change colors several times throughout their lives. They start off transparent before turning brownish-yellow on their sides and belly. Αfter 5–20 years in fresh or brackish water, the eels become 𝓈ℯ𝓍ually mature, their eyes grow larger, their flanks become silver, and their bellies white in color. In this stage, the eels are known as “silver eels”
Α juvenile Octopus

This juvenile octopus is just 2 centimetres wide, and its internal organs can be seen through its transparent body. This one was spotted at night in the deep water off the coast of Tahiti. The orange spots on its tentacles change color and are used for camouflage

Hyperolius leucotaenius is a species of frog in the Hyperoliidae family. It is endemic to Democratic Republic of the Congo. Αt one time thought to be extinct, in 2011 Hyperolius leucotaenius was found and photographed on the banks of the Elila River, a tributary of the Lualaba, during an expedition led by Eli Greenbaum of the University of Texas El Paso.
Transparent Butterfly