How Long Do Pet Store Turtles Live?

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

Short answer

Pet turtles live a long time. The red-eared slider, the most common pet store turtle, often lives well over 20 years in captivity, and the oldest recorded captive slider reached 41. That means a pet turtle can be a multi-decade commitment that needs a large tank, UVB lighting and a basking area. Selling turtles with shells under 4 inches has been banned by the FDA since 1975.

Small turtles look like an easy, low-cost pet, but they are one of the longest-lived animals sold in pet stores, and they grow much bigger than most buyers expect.

Pet turtle lifespan and size

Red-eared slider
Lifespan in captivity Well over 20 years
Oldest recorded captive 41 years
Adult shell length, males about 7.9 inches (20 cm)
Adult shell length, females about 11 inches (28 cm)
Minimum tank for one turtle 20 gallons (larger as it grows)

Source: PetMD, verified by Adam Denish, VMD.

Why many pet turtles don't reach their potential

  • Too-small tanks. A hatchling outgrows a starter kit quickly. PetMD's guideline: the water area should be at least 4–5 times the turtle's length, 3–4 times its width, and deeper than 1.5 times its longest dimension, with 25% more space for each additional turtle.
  • No UVB light. Turtles need full-spectrum UVB for shell and bone health, and glass or plastic between the bulb and the turtle blocks it.
  • No heat or basking spot. Indoor tanks usually need supplemental heat; PetMD cites about 80°F ambient, with an incandescent basking lamp.
  • Poor diet. Sliders are omnivores: commercial turtle food plus vegetables, insects and fish. Young turtles eat daily, adults every second or third day. Iceberg lettuce has little nutrition.
  • Dirty water. Turtles are messy and need powerful filtration.

The 4-inch rule and Salmonella

Turtles commonly carry Salmonella bacteria. Because small turtles are easily handled (and put in mouths) by young children, the FDA banned selling turtles with shells under 4 inches in 1975. The CDC has linked multistate Salmonella outbreaks to small turtles, often bought from street vendors, with more than two-thirds of those sickened in one set of outbreaks aged 10 or younger. Buy only from reputable stores or breeders, wash hands after handling turtles or their tanks, and keep turtles away from kitchens.

Before you buy a turtle

  • Plan for 20+ years of care, including who will take the turtle if you can't.
  • Budget for a large tank or pond, filter, UVB and heat lamps, and an exotic-animal vet.
  • Never release a pet turtle into the wild; contact a reptile rescue or shelter instead.
  • Consider adopting: reptile rescues and shelters often have turtles surrendered by owners who didn't expect them to grow so large.

Find pet stores and animal shelters near you.

Sources

  1. PetMD: Red-eared slider (verified by Dr. Adam Denish, VMD)
  2. Reptiles Magazine: Salmonella outbreaks linked to undersized turtles

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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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