How long have bettas been kept as pets?

Thai villagers began selectively breeding Betta splendens for fighting at least 600 years ago, with some historical accounts placing origins as early as the 14th century. Western aquarium keeping began with Paul Matte's import to Germany in 1896. The mass pet trade expansion happened primarily in the late 20th century.

Who discovered the betta fish?

The fish was formally described by Theodore Cantor in 1849 under the name Macropodus pugnax, based on specimens from the Malay Peninsula. Charles Tate Regan renamed and re-described the species as Betta splendens in 1910 using specimens from Siam. Thai villagers had been breeding the fish for centuries before either scientific description.

Why is it called a Siamese fighting fish?

Because Betta splendens is native to Thailand (formerly Siam) and because Thai plakat fighting culture, formally patronized by King Rama III (r. 1824–1851), produced the selectively-bred fighting lineages that are the ancestors of all modern domesticated forms. The English name translates the cultural context of the fish's regional history.

When did betta fish come to America?

Bettas reached the United States approximately a decade after their 1896 arrival in Germany, with early importation by Frank Locke of San Francisco around 1910. The US hobby expanded gradually through specialty fish importers in the early 20th century.

The International Betta Congress, founded in the United States in 1967. It established formal show standards for ornamental bettas and is the primary international governing body for competitive betta showing.

Betta Fish History: 600 Years from Thai Fighting Fish to Global Aquarium Trade

Betta splendens has one of the longest and best-documented domestication histories of any aquarium fish. The Thai plakat fighting tradition predates Western scientific knowledge of the species by at least 400 years. Cantor wrote it down in 1849; Regan named it in 1910; Matte shipped it to Berlin in 1896; the IBC standardized its showing in 1967. Each date is a chapter in a story that starts in 14th-century Thai rice paddies.

This pillar covers the full documented history across three spokes.

The Thai origin: plakat culture

Thai villagers selected fighting males from wild B. splendens populations in the Chao Phraya and Mekong basin rice paddies. The practice is traceable through oral tradition, regional literature references in Thai and Cambodian sources, and the clay jar fragments used to house fighting males individually. Scholars conservatively date organized selection to the 14th–15th century.

King Rama III (r. 1824–1851) imposed taxes on betta fighting, confirming that by the 19th century the practice was organized enough to generate taxable revenue. Hugh M. Smith, the American ichthyologist who served as Siam’s fisheries advisor in the 1920s, documented the plakat tradition in detail in his 1945 Smithsonian monograph — the foundational English-language source.

The plakat morh (fighting form) and plakat cheen (show form that derived from it) are the genetic backbone of everything that followed. See plakat culture for the complete account.

The broader 600-year arc from Rama III through the 2019 Thai national aquatic animal designation is covered in From Siam to Splendens.

The Western chapter: 1896 to the halfmoon standard

Paul Matte of Berlin imported the first live bettas to Germany in 1896. By 1898 captive spawning was recorded in Europe. Frank Locke brought the species to the United States around 1910. The IBC was founded in 1967, establishing the formal show standards that would drive ornamental breeding for the next 60 years.

The halfmoon standard — the 180-degree caudal spread — was developed by California breeders in the early 1990s. Crowntail emerged from Indonesia in the late 1990s. The modern Thai commercial export industry developed most current fin forms in response to Western show circuit demand, completing a full circle: Thai fish exported to the West, transformed by Western breeding standards, re-imported as show-circuit ideals into Thai industry.

The full Western account is at Bettas in the West: From Berlin to the Halfmoon Standard.

Primary sources

The history pages on this site cite primary sources rather than secondary summaries. Cantor’s 1849 Catalogue, Regan’s 1910 Proceedings paper, Smith’s 1945 Smithsonian monograph, and IBC’s own historical records are the documentary spine. Where primary sources conflict or are ambiguous, the pages say so.

For deeper research: the Biodiversity Heritage Library has Cantor and early 20th-century aquarium journals digitized. The IBC archives document the Western show-breeding era. Thai academic work on plakat culture is published in Thai-language journals and partially synthesized in the 2022 genetic architecture paper (PubMed 36129976).

Frequently asked

How long have bettas been kept as pets?: Thai villagers began selectively breeding Betta splendens for fighting at least 600 years ago, with some historical accounts placing origins as early as the 14th century. Western aquarium keeping began with Paul Matte's import to Germany in 1896. The mass pet trade expansion happened primarily in the late 20th century.
Who discovered the betta fish?: The fish was formally described by Theodore Cantor in 1849 under the name Macropodus pugnax, based on specimens from the Malay Peninsula. Charles Tate Regan renamed and re-described the species as Betta splendens in 1910 using specimens from Siam. Thai villagers had been breeding the fish for centuries before either scientific description.
Why is it called a Siamese fighting fish?: Because Betta splendens is native to Thailand (formerly Siam) and because Thai plakat fighting culture, formally patronized by King Rama III (r. 1824–1851), produced the selectively-bred fighting lineages that are the ancestors of all modern domesticated forms. The English name translates the cultural context of the fish's regional history.
When did betta fish come to America?: Bettas reached the United States approximately a decade after their 1896 arrival in Germany, with early importation by Frank Locke of San Francisco around 1910. The US hobby expanded gradually through specialty fish importers in the early 20th century.
What is the IBC?: The International Betta Congress, founded in the United States in 1967. It established formal show standards for ornamental bettas and is the primary international governing body for competitive betta showing.