Glass frogs can turn on their transparent appearance by hiding 90% of their red blood cells in their liver during sleep, a new study in Science reported Thursday.

Glassfrogs can render themselves nearly invisible while they sleep with a unique trick; they pack nearly 90% of their red blood into one of their organs.

With their red blood cells out of view, the frogs become two to three times more transparent—a trick scientists believe helps the animals avoid predators. (Related:“These see-through frogs are ...

A transparent 'glass frog' is transparent by hiding about 90% of red blood cells in the liver This article, originally posted in Japanese on 23:00 Dec 23, 2022, may contains some machine ...

Those that are transparent include some fish, shrimp, jellyfish, worms and insects — none of which move large quantities of red blood through their bodies. The trick of hiding blood while ...