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What's the best way to tell my betta fish's age from pictures?

Updated on September 23rd, 2025

I want to know how old my male veil tail betta fish is. Do you think you can help me with these pictures?

2 Answers

Most Helpful Answer

Angel Alvarado, LVT

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on June 20th, 2018

The best guess would be an adult. Unless you know the hatch date, it is difficult to be more specific. Adult Bettas are about 3 inches long. They reach this length anywhere between 7 and 12 months of age.
His eyes are dark, his color is good and his fins are long. He's at least a year old. That would be my best "educated guess" based on the images provided.
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Related Answers from Veterinarians

  • 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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