The Oscar fish (Astronotus ocellatus) typically lives around 10 years in captivity. If the breeding environment is optimal—with stable water quality, sufficient space, and a balanced diet—its lifespan may approach the upper end of this range.
Key factors influencing lifespan:
Water quality management: Maintain a water temperature of 25–28°C, a pH level of 6.5–7.5, and perform regular water changes.
Dietary diversity: Offer a mixed diet including live bait, pellet feed, and vegetables.
Disease prevention: Avoid overcrowding to reduce stress and infection risks.
Compared to other ornamental fish, the Oscar is a moderately long-lived species. For example, Guppies live only 1–2 years, while Flowerhorn cichlids can live 6–10 years.