Turtle · Medium Breed
Red-Eared Slider
The Red-Eared Slider is a semi-aquatic freshwater turtle known for the red stripe behind each eye, strong swimming ability, and frequent basking behavior. It is one of the most commonly kept pet turtles, but it grows fairly large, lives for decades, and needs a spacious, well-filtered habitat with heat and UVB lighting to thrive.
The Calculator
How old is your Red-Eared Slider in human years?
At 1 year old
Your Red-Eared Slider is approximately 1 in human years.
Field Notes
About the Red-Eared Slider
Red-eared sliders are native to the southern United States and parts of northern Mexico, where they live in warm ponds, lakes, creeks, and slow-moving freshwater habitats. Because they became extremely popular in the pet trade, they are now found in many places outside their native range after captive turtles were released into the wild.
In temperament, they are usually alert, shy, and quick to slip into the water when startled, but many learn to recognize their regular caretakers and will approach the front of the tank at feeding time. They are not especially cuddly pets, and handling should be limited to reduce stress and lower the risk of spreading Salmonella.
Their care is centered on correct husbandry: clean filtered water, a completely dry basking dock, a reliable heat source, UVB lighting, and a varied omnivorous diet with calcium support. Juveniles eat more animal protein, while adults should receive more plant matter, and poor diet or missing UVB is a major cause of illness in this species.
Exercise needs are met mostly through daily swimming, climbing onto the basking area, and exploring a well-designed enclosure. They do best in a large tank with enough depth to swim freely, and safe supervised access to natural sunlight in warm weather can provide excellent enrichment if escape and overheating are prevented.
Temperament
Exercise Needs
moderate
Health Watch
- Metabolic bone disease
- Vitamin A deficiency
- Respiratory infections
- Shell infections or shell rot
- Internal or external parasites
Grooming
Grooming is minimal, but the turtle's water, basking area, shell, and nails should be monitored regularly, and loose shedding scutes should never be forcibly peeled off.
Growth Curve
Red-Eared Slider weight chart
Typical weight progression from young to adult. The tinted band marks the healthy adult range — 0.3–2.5 kg.
Nutrition, Staged
Red-Eared Slider Feeding Guide
Stage-based portions tuned to breed energy requirements. Use as a starting point — your veterinarian tailors the final numbers.
Formative years
Young
Follow breed-specific puppy feeding guidelines
Peak years
Adult
Follow breed-specific adult feeding guidelines
Mature years
Senior
Follow breed-specific senior feeding guidelines
Questions, Answered
On the Red-Eared Slider
How big do red-eared sliders get? Adult males are usually smaller, often around 7 to 9 inches in shell length, while females commonly reach about 10 to 12 inches. Their adult size means many juveniles quickly outgrow small starter tanks and need a much larger long-term setup.
What should a red-eared slider eat? Red-eared sliders are omnivores, and juveniles usually need more protein while adults should eat a more balanced mix of turtle pellets, leafy greens, and appropriate aquatic foods. A varied diet with calcium support is important, because poor nutrition is a common reason these turtles develop serious health problems.
Do they need a basking light and UVB? Yes, both are essential for normal metabolism, shell health, and proper calcium absorption. Without UVB and a warm basking area, red-eared sliders are much more likely to develop metabolic bone disease, weakness, and poor growth.
Can red-eared sliders live with other turtles? They sometimes can, but cohabitation increases the risk of bullying, biting, food competition, and stress, especially in cramped enclosures. If more than one turtle is kept together, they need plenty of space, close supervision, and separation at the first sign of aggression or injury.
Are red-eared sliders safe for children? They can be interesting family pets, but they are not ideal for very young children because turtles can carry Salmonella even when they look healthy. Hands should always be washed after touching the turtle or its tank, and the enclosure should be cleaned away from food-preparation areas.
Adjacent Breeds
