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Definition of oscar fish

oscar fish

Plural:oscar fish
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• noun

1

A large, highly intelligent freshwater cichlid fish (Astronotus ocellatus) native to the Amazon basin in South America, popular in the aquarium trade but known for its aggressive and territorial behavior.

Example

"Because the oscar fish grows quite large and tends to eat smaller tank mates, it requires a spacious aquarium and careful species pairing."

Synonyms
View all synonyms for oscar fish

• Nearby Words

osage orange
osaka
oscar
oscar fish
oscars
oscillate
oscillation

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

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