When YouTube was founded in 2005, no human being alive could have predicted that the most-viewed video on the platform two decades later would be a two-minute Korean children’s nursery rhyme about a family of fish. Yet Pinkfong’s “Baby Shark Dance” passed fifteen billion views in early 2025 and continues to climb at a pace of millions of plays per day. The video is the most-watched single piece of content in the history of the internet by some distance, ahead of every music video, every news report, every viral comedy clip and every long-form documentary ever uploaded. The story of how it got there is partly a story about children’s media economics, partly about platform algorithms and partly about the durable strangeness of internet culture.

The Origin of the Song

The song that underpins the video has nineteenth-century origins as a North American summer-camp call-and-response chant. Variants have circulated for decades in different countries, and Germany had a viral 2007 dance remix titled “Kleiner Hai” by a singer named Alemuel that briefly charted. Pinkfong, the children’s brand operated by the South Korean educational-content company SmartStudy, produced its own version in 2015. The studio added a kinetic, brightly coloured 2D animation with dancing children and the now-familiar shark family.

The choice to make the song repeat as relentlessly as possible — short verses, hooky refrain, simple dance moves children can imitate — was deliberate. SmartStudy’s product strategy is built on the assumption that pre-school children will watch the same video tens of times in a row, and that the algorithmic recommendation system will reward content optimised for repeat plays.

The Pinkfong Production Strategy

Pinkfong’s catalogue runs to thousands of original songs and animated videos, most produced in-house and many translated into dozens of languages. The studio has built a global brand around its fox mascot and has launched physical merchandise, television series, theatrical productions, mobile apps and museum exhibitions on the back of its YouTube success.

The Baby Shark Dance video, uploaded to Pinkfong’s English-language channel in June 2016, was not an overnight hit. It accumulated tens of millions of views in its first eighteen months, then began compounding rapidly through 2018 and 2019. By November 2020 it had passed seven billion views and dethroned the previous all-time YouTube champion, Luis Fonsi’s “Despacito.” Since then it has roughly doubled in cumulative plays. The cumulative replay total now exceeds the world’s population twice over, an arithmetical reality of children’s content economics where each child accounts for hundreds of plays.

The Children’s Content Economics

The economics that make Baby Shark possible are unusual. Pre-school audiences re-watch the same video repeatedly, generating much higher per-viewer view counts than nearly any other genre. Algorithms optimise for watch time and completion rate, both of which are maximised when a child returns to the same favoured video again and again. Parents, who often hand a phone or tablet to a child as a brief distraction, do not curate against repetition the way an adult might.

This combination has produced a category of YouTube channels whose top videos accumulate billions of views with relatively small production budgets. Cocomelon, the Los Angeles-based animation studio acquired by Moonbug Entertainment in 2020, has multiple videos in the YouTube all-time top twenty. LooLoo Kids, a Romanian children’s brand, owns “Johny Johny Yes Papa,” another top-ten all-time YouTube video. ChuChu TV, an Indian children’s animation studio, holds several places in the global top fifty. Together these channels have rewritten the all-time-most-watched leaderboard in less than a decade.

The Algorithm’s Role

YouTube has maintained for years that recommendations to children under the age of thirteen on the main consumer YouTube app are restricted in particular ways under the U.S. Children’s Online Privacy Protection Act. The dedicated YouTube Kids app, launched in 2015, has stricter content policies. In practice, however, children regularly watch content on the standard YouTube app on shared family accounts, and the recommendation system on the standard app has historically been generous to high-watch-time children’s content.

The Federal Trade Commission settled a 2019 case with Google over alleged COPPA violations, which led to substantial changes in how YouTube handles content “made for kids.” Channels must designate their content as such, and “made for kids” content has personalised advertising switched off, limiting revenue. The consequence has been a more uneven economic landscape for children’s creators. Some, like Pinkfong, have diversified into merchandise, television and live events. Others have reduced their YouTube investment.

The Cultural Phenomenon

Baby Shark’s reach has extended far beyond YouTube. The song charted on the Billboard Hot 100 in 2019, peaking at number thirty-two, an unusual achievement for a children’s song. The Washington Nationals adopted it as a rally song during their 2019 World Series run, and it was played at major political and sporting events. South Korea’s Defence Ministry briefly endorsed it as a marching cadence. The U.K.’s Royal Navy used it in recruiting materials.

The cultural saturation has had its critics. Several parenting forums, and at least one peer-reviewed paper in the Journal of Pediatric Psychology, have explored the phenomenon of parental annoyance with the song. The phrase “Baby Shark earworm” has its own Wikipedia entry. Pinkfong, for its part, has leaned into the phenomenon with adult-targeted spin-offs, ironic merchandising and live concerts that have toured dozens of countries.

The Animation and Music Production

The visual style of Baby Shark — flat colours, exaggerated facial expressions, child performers dancing in the foreground — is widely imitated. The animation production cycle for a typical Pinkfong video is short, with most of the development effort spent on the music, vocal performance and dance choreography. The visual layer is intentionally simple so that the song can be re-rendered for different markets, holiday variants, language localisations and merchandise tie-ins without expensive re-animation.

SmartStudy’s headquarters in Seoul houses a production studio that operates more like a children’s-television network than a digital-only YouTube channel. The studio retains a permanent staff of composers, animators, video editors and English-language vocal performers. The English-language Baby Shark Dance was performed by a children’s chorus that has since toured globally, and several voice performers credited on the original recording have built careers in children’s media on the back of the success.

Pinkfong’s Diversification

Recognising that no single video would remain at the top of YouTube forever, Pinkfong’s parent SmartStudy has spent the past five years building a diversified children’s media business. Highlights include a Nickelodeon animated television series (“Baby Shark’s Big Show!”) that debuted in 2020, multiple major theatrical releases distributed via Paramount and Universal, a live touring concert series (“Baby Shark Live!”), a mobile games portfolio and a substantial merchandise programme.

By 2024 SmartStudy had publicly stated that licensing and merchandise revenues had become a larger contributor to the company’s bottom line than YouTube advertising. The strategic shift mirrors what Disney did fifty years ago with character licensing: a single piece of intellectual property becomes the seed of an extended franchise. The video on YouTube is no longer the product; it is the marketing engine for the product.

The Competitive Landscape

Several other children’s brands have built comparable scale. Cocomelon’s “Bath Song” was for many years the second most-viewed video on YouTube and remains in the top ten. The brand was acquired by Moonbug Entertainment for a reported three billion dollars in 2020 — at the time, one of the largest acquisitions in digital children’s media history. Moonbug itself was later acquired by Candle Media in 2021.

LooLoo Kids’ “Johny Johny Yes Papa” briefly held the record for the fastest video to one billion views in the children’s category, before being overtaken by both Pinkfong and Cocomelon properties. ChuChu TV, based in Chennai, India, holds the distinction of being the largest children’s YouTube channel from outside the United States, the United Kingdom and South Korea. The success of these channels has prompted established media companies — Disney, Nickelodeon, Sesame Workshop — to invest more aggressively in YouTube-native children’s content.

The Concerns About Screen Time

The success of Baby Shark and its peers has reignited debates about children’s screen time. The American Academy of Pediatrics has recommended no screen time for children under eighteen months other than video chat, and limited use thereafter. The U.K.’s NHS has similar guidance. Researchers continue to study whether and how exposure to fast-cut, high-stimulation children’s video content affects developing attention spans.

Pinkfong’s response, in interviews with educational-press outlets, has been to emphasise the music and movement components of its content, arguing that videos that prompt children to dance and sing along are qualitatively different from purely passive viewing. The argument is plausible but does not resolve the broader question of whether YouTube’s recommendation system is well-suited to young children’s developmental needs.

The Successor Question

Whether Baby Shark Dance will hold the top spot on YouTube indefinitely depends on whether a successor children’s video can achieve the same compounding pattern. Cocomelon’s catalogue is the most plausible challenger; several of its individual videos have accumulated views at a rate comparable to Pinkfong’s. The growth pattern of any single video is also vulnerable to YouTube’s policy changes, the introduction of YouTube Kids and Shorts, and the rise of TikTok as an alternative attention platform for older children.

The likeliest outcome over the next decade is that children’s videos will continue to dominate the all-time YouTube top ten, but that the specific titles will rotate. Adult-targeted music videos, by contrast, will probably struggle to enter that top tier without an equivalent re-watch pattern, even as their streaming numbers grow.

What Baby Shark Reveals About the Platform

The simplest reading of Baby Shark’s dominance is that YouTube’s discovery algorithms reward what works for the broadest, most reliable audience, and that audience turns out to be children rather than the heavy adult viewers the platform spent its first decade courting. The economics, the cultural pattern of repeat viewing and the platform’s optimisation goals align in favour of children’s content.

This is not necessarily good news for YouTube. Children’s-content advertising rates are lower because COPPA rules limit personalisation. The brand-safety implications of having the most-viewed videos on the platform aimed at three-year-olds are awkward. And the moderation costs of policing children’s videos for inappropriate content are substantial. Yet the audience exists, the content is available and the algorithm rewards it.

The story of Baby Shark, in the end, is the story of an unexpected convergence between Korean children’s media production, American venture capital, global pop-culture appetites and a platform whose recommendation system rewards behaviour patterns that turn out to be most reliable in toddlers. Twenty years after YouTube’s founding, the most-watched video on the internet is two minutes of a cartoon shark family. That is a fact worth taking seriously — about the platform, about modern parenting and about the elasticity of attention itself.