How Long Do Pet Store Betta Fish Live?

Updated October 13, 2026 · 2 min read · 3 sources

Short answer

With good care, betta fish typically live about 3 to 5 years, and Chewy's vet-reviewed guide puts the average at 5 to 7 years. A pet store betta may already be 6 to 12 months old when you buy it, and time spent in small cups can shorten its life. A filtered, heated tank of at least 5 gallons is the biggest factor in how long it lives.

Bettas (Siamese fighting fish) are among the most popular pet store fish, often sold in small cups. Many die within months because of how they're kept, not because they're short-lived.

Betta lifespan

Lifespan
Typical with good care (Chewy beginner guide) 3–5 years
Average cited in Chewy's betta lifespan article 5–7 years
Age when bought from a pet store Often already 6–12 months

Source: Chewy articles medically reviewed by Chewy veterinarians.

Why pet store bettas may not live as long

  • They're already adults. Chewy notes pet store bettas may be 6 to 12 months old at sale, and buyers rarely know their age or background.
  • Holding conditions. Fish kept in overcrowded tanks or tiny cups before sale may have shorter lives.
  • Breeding for looks. Inbreeding for fin shape and color can shorten lifespan in some lines.
  • Poor housing at home. Unheated bowls without filters are the most common cause of early death.

How to help your betta live longer

  1. Tank: at least 5 gallons, with a filter. A low-flow or sponge filter keeps currents gentle for long fins.
  2. Heater: bettas are tropical; use a heater that keeps the temperature stable (Chewy recommends staying within 2°F of variation).
  3. Water quality: treat tap water with conditioner, test ammonia, nitrite and nitrate weekly and do regular partial water changes. See how often to clean a fish tank.
  4. Diet: high-quality betta pellets in small amounts; frozen, freeze-dried or live foods can replace pellets once or twice a week. Don't overfeed.
  5. Tank mates: keep male bettas alone; they can be aggressive to other fish.
  6. Enrichment: live or silk plants and places to rest near the surface.

How to pick a healthy betta at the store

  • Choose a fish from a filtered display tank if possible.
  • Look for bright color, intact fins, clear eyes and active swimming.
  • Avoid fish lying on the bottom, with clamped fins, white spots or fuzzy patches.

Can a betta go without food while you travel?

A healthy adult betta can go up to about a week without food, but for longer trips arrange a feeder or sitter. See how long fish can go without food.

Find pet stores near you for betta tanks and supplies.

Sources

  1. Chewy: How long do betta fish live? (2025)
  2. Chewy: The 10 best pet fish for beginners (vet-reviewed, 2026)
  3. PureWow: How long can you leave a fish at home? (2022)

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This article is general information for pet owners, not veterinary, legal or financial advice. Prices vary by city and clinic; always ask your veterinarian or provider about your own pet.

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