Most amphibians can glow in the dark

Amphibians that can glow in nature are not uncommon as many people think.

In a study published February 27, scientists Jennifer Lamb and Matthew Davis of St Cloud State University in Minnesota said they exposed 32 species of frogs, salamanders, newts and eels. with blue or ultraviolet light, and discovered that these organisms emit colorful patterns in a process called "bioluminescence". These patterns are very diverse from spots and stripes with many colors such as green, orange and yellow. Some even have skin excretion and fluorescent green urine.

Fluorescent models vary depending on the variety and body type of a salamander.
(Photo: cbsnews.com).

Bioluminescence allows the organism to emit light after absorbing the first light energy. This process occurs through various mechanisms thanks to the presence of fluorescent proteins that exist in the skin and bones. Some amphibians also have chromosomes, or contain pigments and light-reflecting cells.

According to scientists, many amphibians are nocturnal and mainly concentrated in forests. Therefore, the ability to glow can help them find each other, as their eyes contain rod-shaped cells that are sensitive to green or blue light. Bioluminescence can also create a greater contrast between amphibians and their habitats, allowing other amphibians to easily recognize each other.

Bioluminescence is also recognized in some other species, helping them to camouflage, hunt or find mates. For example, jellyfish take advantage of this special ability to prevent predators. Meanwhile, the flickering light emitted at the tail of the adult fireflies is the " dance" that invites the mates of this creature.

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