Betta fish · Life stages

Approximate age ranges for Betta fish and the priorities of each stage.

  1. 1

    Juvenile

    Birth – 4 months

    Betta fish grow fast in their first months, developing their colors and fins. A cycled, heated aquarium and small, frequent meals are the foundations of this stage.

  2. 2

    Adult

    4 months – 3 years

    Between 4 months and 3 years, bettas are at their most colorful and active. Stable water quality, measured feeding and an enriched aquarium are the foundation of this stage.

  3. 3

    Senior

    3 years and older

    Bettas can show signs of ageing from about 3 years of age. A calmer aquarium, resting spots near the surface, easy-to-reach food and stable water quality make this stage more comfortable.

Age ranges are approximate; differences within a species (such as size in dogs) can shift the transitions earlier or later.