Watch David Attenborough's documentary on bioluminescent creatures, which have been observed using light for hunting, mating, communication, and self-defense, and number in the thousands of species.

View illustrations of bioluminescent functions in marine organisms

Bioluminescence can startle predators, camouflage, lure prey, confuse rivals, or facilitate mate recognition. One tactic—the burglar alarm—involves an organism releasing light to attract a larger predator to its attacker as a means of defense.

Bioluminescence provides organisms with a method of hunting, defense, or mating

Unlike glow sticks, bioluminescent reactions use renewable resources like oxygen and ATP. This ability allows fireflies to mate and deter predators, anglerfish to confuse and attract prey, and deep-sea shrimp to defend themselves by vomiting glowing slush.

Bioluminescence became common in the ocean to support survival in dark environments

Despite seeming like a rare ability in land animals and unseen in plants, bioluminescence has evolved at least 29 times across marine species, indicating its necessity for survival where hiding spots are rare and highlighting how environments provide evolutionary pressure.

Bioluminescent organisms produce their own light through chemical reactions involving unstable, energetic molecules, while biofluorescent organisms almost immediately re-emit light shone on them, but at a different wavelength.

View a gallery of bioluminescent organisms, including jellyfish and mushrooms

Some species produce a quick flash of light, while others glow steadily with an eerie glow, often to seek attention or in response to being disturbed. Snails, worms, fungi, and other organisms highlight that this ability evolved independently, rather than from one common ancestor.

Humans have used bioluminescence as a means of military advantage

During World War I, the British Navy sank a German U-boat after spotting the blue light forming at the sides and in the wake of the boat. Jellyfish slime was applied to a Roman walking stick for nighttime guidance, while bioluminescent fungi in Indonesia fulfilled the same purpose.

The first appearance of bioluminescence was at least 540 million years ago

After analyzing fossils, genetic data, and statistical methods, scientists believe octocorals were the first organisms to evolve light-producing abilities. As a result of independent evolution across at least 94 species, this phenomenon is connected to a diverse range of behaviors.

Biofluorescent animals—those that absorb light, such as ultraviolet rays, and re-emit other types of light, such as neon green—include some flying squirrels, scorpions, sea turtles, and platypuses.

View a sample of the bioluminescent tree of life

This diagram shows 42 different light-producing organisms, from bacteria and fungi to worms, fish, and crustaceans. It illustrates how the ability to produce light has appeared multiple times across the tree of life, rather than stemming from a single ancestor.

Massive blooms of microscopic algae called dinoflagellates produce the neon blue light seen in glowing tides.

A list of some of the best episodes from David Attenborough's works and where to watch them

From the first steps of the long-eared jerboa—an animal not captured on film before "Life Story"—and bears catching salmon on their upstream pilgrimages to the bioluminescent sea creatures in the trenches of the ocean and Weddell seals giving birth, learn where to see some of the most remarkable moments in Attenborough's catalog.

Why 75% of ocean animals glow

About 75% of ocean creatures can make their own light. It's called bioluminescence—and it all comes down to a special chemical reaction happening inside their bodies.

Watch every episode of David Attenborough's 'Life on Earth' series

A three-year global expedition by Attenborough and his team produced the television series, which debuted in the UK in 1979 and documented over 600 species in 40 countries. The series is estimated to have been seen by over 500 million people in more than 100 territories, including within the US, where is debuted on PBS in 1982.

Bioluminescent reaction enzymes are often used in biomedical research

Near-infrared luciferase systems allow researchers to image and analyze cellular activity in living animals because they penetrate tissue more deeply than visible light. This provides a means of studying gene expression and protein interactions without harming the animals.

View examples of luciferin, the light-emitting molecule behind bioluminescence

Bioluminescent marine organisms rely on various unique luciferins, including Cypridina-type luciferin in seed shrimp and chlorophyll-based dinoflagellate luciferin, to react with oxygen to produce light. These chemicals require unique catalysts to help them bind with oxygen.

Solutions of bioluminescent bacteria can create FOMO-inducing living art

A 2002 exhibition at Montana State University-Bozeman placed the bacteria onto petri dishes that served as macroscopic pixels to create images. Once the bacteria finished eating all the food in the sealed dishes, the light slowly faded away, ending the exhibit.

Bioluminescence may provide a sustainable alternative to electric lighting

French start-up Glowee is experimenting with lights made from bioluminescent microorganisms in public spaces to reduce energy use. While the technology shows promise, challenges remain with brightness, maintenance, and scaling it for widespread use.

David Attenborough reflects on some of his most moving natural encounters

The legendary natural historian has had more direct encounters with wildlife than most people in history. As he turned 99, the Englishman recounts his favorite encounters with marine life, from whales to capuchin monkeys in mangroves. Despite the obstacles the environment faces, Attenborough believes in nature's resilience.

Listen to the music David Attenborough recorded during his expeditions around the world

During this audio documentary feature, Attenborough plays musical performances by communities he encountered while producing natural history series, including Gamelan orchestras in Bali, palace music in Tonga, and Aboriginal didgeridoo players. With each recording, he provides anecdotes about when it was made, decades ago.

A conversation with David Attenborough about his work, from his narrative style to technology

Although he began working in television before owning a television set, gaining experience as a producer in the editing room helped Attenborough develop an insight into creating engaging content with less dialogue. Among the technologies pioneered during his career were stabilized cameras for aerial shots, infrared and microphotography, and waterproof electronics for underwater cameras.

View a gallery of biofluorescent animals, which contain cells that emit various colors when exposed to ultraviolet light.

Fireflies light up to provide mating signals and warnings to predators

Variations in the illumination patterns and flight paths while emitting light have been observed across firefly species. Some species instead rely on pheromones if they are primarily active during the day or have lost the ability to illuminate.

Watch a digital archive of David Attenborough's 'Planet Earth' miniseries

Created over five years, the production was the first documentary series to be filmed in high definition and, when released in 2006, the BBC's most expensive nature documentary series. The Emmy Award-winning series featured 11 episodes, each focused on a different Earth biome.

Explore a searchable database of David Attenborough's works to learn where to watch any of the almost 5,000 episodes he has presented across 90 series.

View some of the species named after David Attenborough

Acisoma attenboroughi is a dragonfly from Madagascar named in honor of Attenborough's 90th birthday. Stating they liked watching Attenborough's documentaries with their family, the discoverer of a flightless weevil from Indonesia named it Trigonopterus attenboroughi in 2014. A Peruvian frog was named Prisimantis attenboroughi in 2014 to honor Attenborough for raising awareness of wildlife conservation.

Because it is observed in organisms that are not closely related, biofluorescence is thought to have emerged independently many times in nature—over 100 in fish alone.

David Attenborough's career, from managing television programming to natural historian

Throughout his career, Attenborough's storytelling style framed nature as the stage where plants and animals were characters that audiences could connect with and become emotionally attached to. Before the breakout success of "Life on Earth" and working full-time on making programs about the natural world, Attenborough spent a decade in executive roles responsible for overseeing content on BBC channels.

Watch David Attenborough catching a python on 'Zoo Quest'

The first series, hosted by the famed natural historian, was meant to be presented by Jack Lester, a curator at the London Zoo, who would be documented while they captured wildlife to bring to the institution. Because Lester became ill, Attenborough became the presenter and often participated in the capture of animals, such as snakes.

Some North American bats can glow in the dark

After examining 60 museum specimens from six different species, scientists found that all of them emitted light after being exposed to ultraviolet radiation. Researchers are perplexed by this natural phenomenon and are currently unable to deduce the reason behind it.

Read 10 of the best quotes about nature from David Attenborough

From reflecting on the interconnectedness of life and humanity's shared responsibility to protect biodiversity to the power of young people in driving change and understanding nature's beauty and importance, this list highlights some of the most noteworthy things said by the famed natural historian.

David Attenborough discusses creationism and his position as an agnostic

Attenborough argues that accounts of humanity's origins from different cultures cannot all be correct because they often differ, whereas geological records are consistent worldwide, meaning science provides the best understanding of the natural world. However, he acknowledges that, just as insects lack awareness of human goings-on, humans may be unaware of the existence of a deity.

Watch David Attenborough's unexpected interaction with a family of gorillas on 'Life on Earth'

On the border between Rwanda and the modern-day Democratic Republic of the Congo, Attenborough used specific vocalizations and behaviors to approach a female gorilla peacefully, only to have two of her children lie down on him. Through a comical exchange, the incident helps show the creatures to be the opposite of the aggressive, violent stereotypes about them.

The BAFTAs won by David Attenborough, the only person to win across five visual display formats

The British Academy of Film and Television Arts awarded the naturalist for programming in black and white, color, high definition, 3D, and 4K resolution, starting with his first BAFTA in 1961. The VR film "David Attenborough's Great Barrier Reef" also won a BAFTA for London-based Alchemy VR in the Digital Creativity category.

Blacklights can illuminate certain biological materials, including blood, teeth, and fingernails, because they contain fluorophores—molecules that visibly glow immediately after exposure to higher-energy light.

Discussing his early life, David Attenborough describes how his TV career began by chance

Growing up on the University College, Leicester campus, where his father was principal, Attenborough uncovered specimens such as coiled shells in the rocks and limestone of the surrounding Midlands, which sparked his interest in nature. A week after not landing an interview for a radio job he had applied for, Attenborough was offered a position on "a new thing called television."

Take a virtual tour of the Royal Research Ship named after David Attenborough

Operated by the British Antarctic Survey, the RRS Sir David Attenborough and its onboard tools and laboratories have investigated the biogeochemical cycles of the Southern Ocean, the stability of Greenland's ice shelves, and the impact of climate change on marine ecosystems. One of the ship's autonomous underwater vehicles was named Boaty McBoatface based on the results of a naming poll from the Natural Environment Research Council.

The 10 most amazing deep sea creatures

In this video, researchers from the world-renowned Monterey Bay Aquarium discuss the most fascinating deep sea creatures, and how they developed some of their strangest features.

David Attenborough received the 2021 Champions of the Earth Lifetime Achievement Award

The UN's highest environmental honor celebrated Attenborough as "one of the leading voices of the global environmental movement." For at least four decades, he collaborated with the UN Environment Programme by advocating for "efforts to counter the climate crisis, biodiversity loss and pollution" and addressing "world leaders at the UN Climate Change Conference" in 2021.

View a gallery of animals found on abyssal plains, hydrothermal vents, seamounts, and other deep-sea habitats.

Watch insects and animal pollinators in slow motion

Louie Schwartzberg's "Moving Art" series showcases slow-motion footage of oceans, forests, deserts, flowers, and more. In this excerpt, organisms such as bats, monarch butterflies, bees, and hummingbirds are shown interacting with one another and with flowering plants.

View a gallery of plants made to shine using ultraviolet-induced visible fluorescence photography, in which organisms re-emit the ultraviolet light they are exposed to in vibrant, glowing colors.

View a breakdown of the identified species on Earth, led by about one million insect species, while mammals such as humans make up one of the smallest groups.

Evolution doesn't want you to see these animals

Invisibility is an oft-coveted superpower that many creatures throughout the animal kingdom have evolved to mimic through transparent camouflage. This article explores the science of this seemingly magical ability. The two critical ingredients in...

Divers capture a blanket octopus unveiling her billowing membrane

In a short clip captured during a blackwater night dive in the Lembeh Strait, a blanket octopus unfolds and displays a colorful web multiple times its original size. The aquatic animal’s iridescent body and tentacles glow against the nighttime...

Why David Attenborough was skeptical about global warming before bringing attention to it

Believing he was "experiencing the untouched natural world" in his early documentary series, Attenborough has admitted that many of his assumptions about human action were incorrect. It was not until attending a 2004 lecture on greenhouse gases and global temperatures that he became convinced of the science.

Listen to recordings of different fish species

Scientists have captured and curated this collection of species-specific recordings, helping us gain a deeper understanding of underwater ecosystems. Uncover their sounds, which include a lot of thumps, burps, and grunts.

When caught in the mouths of cardinal fish, seed shrimp release glowing, bioluminescent chemicals, which alert predators of the cardinal fish, prompting the shrimp's ejection.

Underwater nighttime photos capture the ocean's diversity

Self-taught photographer Steven Kovacs explores Palm Beach's ocean after sunset, capturing tiny sea creatures in deep waters. Over eight years, he's dived into Florida's eastern coast, drifting from 0 to 100 feet, photographing rarely seen larval fish. Lacking formal marine biology training, Kovacs collaborates globally to identify species like cusk eels and the female blanket octopus, known for its revealing membrane. Check out his photos here.

Some female fireflies mimic the signals of other species to lure in and eat them

The genus Photuris does not produce its own defensive pheromones to ward off predators, so it has developed mimicry to attract males of firefly species that do. Unsuspecting males are consumed after these chemicals—lucibufagins—are extracted.

Bacteria have been genetically engineered to bioluminesce when wine has spoiled

Developed by researchers at Hebrew University, the method involves the firefly enzyme luciferase, which emits light from within bacteria expressing when they are in the presence of acetic acid vapors produced by wine. The process provides affordable, on-site, real-time monitoring of fermentation quality.