Red-eared Slider

Overview

Red-eared sliders are hardy, outgoing turtles named for the red stripe behind each eye ²⁴. Males average about 8 inches and females about 11 inches ³. They live well over 20 years, and the oldest recorded captive reached 41 ³. Many become tame and seem to enjoy human company, especially when raised young ². Albino, pastel and leucistic morphs are also bred ². The catch is that too many sliders are bought as tiny hatchlings by people unprepared for a large aquatic turtle. Tree of Life encourages adopting from a rescue instead ¹.

Natural history

Red-eared sliders are native to the Mississippi Valley, from Illinois to the Gulf of Mexico, and into Mexico ¹². They live in quiet rivers, ponds and creeks with soft bottoms, lots of plants and logs for basking, often stacked one on top of another ¹². Released pets have made them one of the world's 100 most invasive species, now found on every continent except Antarctica ¹. Sleeping sliders often rest motionless on the bottom or float at the surface. If one rouses easily, it's just asleep ².

Enclosure

• Water. At least as deep as the turtle is wide, with room to swim. For most adults that means 75 to 100 gallons per turtle ¹.
• Outdoors. A pond of 300 gallons or more is ideal where climate allows ¹.
• Basking. A dry platform under a heat lamp, plus submerged rocks and logs ¹.
• Filtration. Use a filter rated for at least twice the tank volume, because turtles are messier than fish ¹.
• Substrate. Skip sand and gravel, which turtles swallow and which can block the gut ¹.

Temperature & lighting

Turtles need UVB to process calcium ¹. Use a high-output fluorescent or mercury vapor reptile bulb over the basking area and replace it every 6 to 12 months, since UVB fades before the light does ¹.

Humidity

As an aquatic species, sliders have no separate humidity target. Keep the water clean, filtered and the right temperature, and keep the basking area dry ¹.

Substrate

A bare bottom or large, unswallowable rocks are safest. Avoid sand and gravel ¹.

Diet & supplementation

• Base diet. A high-quality turtle pellet, fed in the water ¹.
• Extras. Live or frozen freshwater fish, earthworms and mealworms ¹.
• Greens. Aquatic plants such as water lettuce, plus romaine or collards ¹.
• How often. Daily to every 3 days. Overfeeding causes obesity and dirty water ¹.
• Avoid iceberg lettuce and poor-quality diets, which lead to vitamin A deficiency ⁵.

Handling & temperament

Sliders are hardy and outgoing ⁴. Most turtles carry Salmonella without showing illness. Wash your hands thoroughly after handling, feeding or cleaning ⁶.

Health

Common issues ⁵

• Vitamin A deficiency. Swollen eyes, ear abscesses and respiratory infections.
• Respiratory infections. Bubbles from the nose, wheezing, open-mouth breathing. Tilting to one side while swimming can signal pneumonia.
• Metabolic bone disease. Soft or misshapen shell or deformed legs.
• Shell infections, abscesses, fractures and parasites.

When to see a vet

See your vet for swollen eyes, nasal bubbles, open-mouth breathing, shell deformities, tilting while swimming, or a turtle that stops eating ⁵. Quarantine new turtles for at least 60 to 90 days ².

Breeding overview

Adult males are smaller, with long front claws and longer, thicker tails. They flutter their claws at the female's face in courtship ². Females lay eggs in spring and summer and need a nest box with soil or sand, or they may drop eggs in the water ².

Legal & ethics

Since 1975, US federal rules have banned selling turtles under 4 inches, because small turtles spread Salmonella to young children ⁶⁷⁸. The only exceptions are bona fide scientific, educational or exhibition purposes other than as pets ⁷. Tree of Life notes some sellers misuse this exception ¹. Never release a slider. Released pets are why the species is invasive worldwide ¹⁴. Rehome through a rescue instead ¹.

Sources

1. Red-Eared Slider Care · Tree of Life Exotic Pet Medical Center
2. Red Eared Slider Care · Chicago Exotics Animal Hospital
3. Red-Eared Slider · PetMD
4. Basic Information Sheet: Red-Eared Slider · LafeberVet
5. Common Diseases of Aquatic Turtles · VCA Animal Hospitals
6. Owning Aquatic Turtles · VCA Animal Hospitals
7. 21 CFR 1240.62: Turtles intrastate and interstate requirements · Electronic Code of Federal Regulations
8. Salmonella and Turtle Safety · U.S. Food and Drug Administration

Last reviewed 2026-10-24 by Novel Fauna. This guide is general husbandry information, not veterinary advice. When an animal is sick, see a veterinarian experienced with exotic animals.

Revision history

1. 2026-10-24 Library: fix source frontmatter, hognose difficulty, fallback guide links, hero copy a22966a
2. 2026-10-24 Library: 50 cited care guides, /library/[slug] route, coming-soon cards, SLUGS.txt synced to species.guide_slug 228ce54

Evidence grades: Novel Fauna editorial: source classification, not yet expert-reviewed, 2026-10-25. What the grades mean.

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