How Long Till A Betta Is Full Grown?

Betta fish are a species of freshwater fish that are native to Southeast Asia. They are known for their vibrant colors and long fins, and are a popular choice for aquariums and fish bowls.

Betta fish grow to be about 3-4 inches in length, and they typically have a lifespan of 2-5 years.

Do betta fish grow in size?

Betta fish do not grow in size. Betta fish are typically about 2 inches in length when they are purchased and can reach up to 3 inches in length.

How quickly do betta fish grow?

Betta fish grow quickly, doubling their size in six to eight weeks. They reach sexual maturity at six to eight months old.

How do I know when my betta is full grown?

It can vary depending on the individual betta fish and its growth rate. However, some general indicators that may help you determine when your betta fish is full grown include: its size, shape, and color; the number and size of its fins; and the amount of fat it has.

Additionally, your betta may start to display signs of aggression or refusal to eat, which could be indications that it is reaching its full potential size and is no longer growing or developing at a fast rate.

How long do bettas live?

Bettas can live between six and eight years.

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How old are bettas at Petco?

Bettas can vary in age from a few weeks to over a year. However, on average, bettas reach maturity around 6-8 months old.


A betta is full grown at around six months old. However, they can continue to grow and fill out for up to a year.