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Definition of siamese fighting fish

siamese fighting fish

Plural:Siamese fighting fish
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• noun

1

A popular freshwater aquarium fish (Betta splendens) native to Southeast Asia, particularly Thailand, noted for the male's highly aggressive behavior towards other males and its vibrant, elaborately flowing fins.

Example

"The enthusiast carefully set up a separate tank for his new Siamese fighting fish to prevent it from attacking the other males."

Synonyms
View all synonyms for siamese fighting fish

Word Nuance & Usage

Commonly referred to simply as a 'betta' in the aquarium trade, though 'Betta' technically refers to an entire genus comprising many different species.

• Nearby Words

siamese
siamese algae eater
siamese crocodile
siamese fighting fish
sibbaldia
siberia
siberian iris

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Siamese fighting fish. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/siamese-fighting-fish
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