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How can I tell how old my betta fish is and what are the signs?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | 1lb

Hello , How do I know how old my betta fish is.

2 Answers

Most Helpful Answer

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Answered By Jeffrey Milner

Veterinarian

Published on May 6th, 2017

Determining Chum's age is not an exact science by any means. However, certain characteristics can lead one to believe whether or not it is young, adult, or senior. If longer than about 3cm, it is most likely at least an adult. If you look at the fins, if they appear to be completely in tact, robust, and unfaded in color, you likely have an adult rather than a senior fish. More elderly fish tend to swim less and will tend to spend more time hiding behind objects if available. Older fish, betta included, can also have characeristic cloudiness to the eyes, known as cataracts.

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Other Answers

  • Image profile

    Answered By Jeffrey Milner

    Veterinarian

    Published on May 6th, 2017

    Determining Chum's age is not an exact science by any means. However, certain characteristics can lead one to believe whether or not it is young, adult, or senior. If longer than about 3cm, it is most likely at least an adult. If you look at the fins, if they appear to be completely in tact, robust, and unfaded in color, you likely have an adult rather than a senior fish. More elderly fish tend to swim less and will tend to spend more time hiding behind objects if available. Older fish, betta included, can also have characeristic cloudiness to the eyes, known as cataracts.

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    1Pet Parents found this answer helpful

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