Red-Eared Slider vs Musk Turtle
This is the one comparison on the site with a clear lean. Sliders are cheap, common and attractive, but adults reach 25-30 cm, need 120 cm of tank, live thirty to forty years, and are an invasive species that is illegal to release. Musk turtles top out at 7-13 cm and fit in 75 litres. In an apartment there is not much to weigh up.
Trachemys scripta elegans
Some experience needed
Check the source
Sternotherus odoratus
Beginner friendly
Legal to keep
Where they actually differ
1 Adult size β the decisive difference
Female sliders reach 25-30 cm of carapace, roughly the size of a dinner plate. Musk turtles finish at 7-13 cm, among the smallest aquatic turtles. In the shop the hatchlings look similar, which is exactly the problem β most people decide based on the juvenile.
2 Tank requirements
An adult slider needs 120 cm or more plus heavy filtration. A musk turtle is fine in 75-115 litres. In a rented flat or a small home, that gap is decisive.
3 Water depth runs the opposite way
Sliders swim well and can have deep water. Musk turtles are bottom-walkers with poor swimming ability, and water that is too deep with a hard-to-climb exit leads directly to drowning. It is the most common musk turtle mistake, and it comes precisely from setting the tank up like a slider tank.
4 Invasive species status
The red-eared slider is one of the world's most damaging invasive species and is under management in China; releasing one is unlawful, and abandonment severely harms local waterways. Musk turtles are also non-native and must never be released, but the slider's invasiveness and sheer numbers in the trade make the abandonment problem far larger.
5 Basking behaviour
Sliders haul out and bask regularly, which is a large part of the appeal. Musk turtles rarely leave the water and spend most of their time on the bottom β this is normal, so do not keep rebuilding the setup over it. If watching a turtle bask is what you want, the slider fits the expectation.
6 Temperament and handling
Sliders are comparatively sociable and learn to recognise whoever feeds them. Musk turtles have long necks that reach most of their own shell, they bite, and they release a musky secretion when alarmed (hence the name). Frequent handling is not advisable.
Specifications side by side
| Red-Eared Slider | Common Musk Turtle | |
|---|---|---|
| Difficulty | Some experience needed | Beginner friendly |
| Lifespan | 20-40 years | 20-50 years |
| Adult size | Females reach 25-30 cm carapace; males stay smaller at 15-20 cm | 7-13 cm carapace, one of the smallest aquatic turtles |
| Diet | Omnivorous. Juveniles lean carnivorous (pellets, dried shrimp, small fish); adults should transition largely to aquatic plants and greens | Carnivorous. Pellets as a base, supplemented with snails, dried shrimp, earthworms and pieces of fish |
| Temperature | Water 24-28 Β°C, basking spot 32-35 Β°C | Water 22-26 Β°C, basking spot 29-31 Β°C (it basks far less than a slider) |
| Humidity | Aquatic β what matters is water quality and filtration, not air humidity | Aquatic β what matters is water quality and depth. Do not set it up to slider specifications |
| Legal status | Check the source | Legal to keep |
The short answer
Choose the red-eared slider ifβ¦
You have room for a tank of 120 cm or more, can maintain serious filtration, enjoy watching a turtle bask, and genuinely accept a thirty-to-forty-year commitment. They are cheap, hardy and rewarding to watch β provided you build for the adult rather than the hatchling.
Red-Eared Slider Β· Full care sheet βChoose the musk turtle ifβ¦
You live in an apartment with limited space but still want an aquatic turtle. Adults are a third the size of a slider, 75 litres suffices, and they are quieter. The cost is that they are not sociable, they bite, they rarely bask, and they still live 20-50 years.
Common Musk Turtle Β· Full care sheet βIn an apartment, take the musk turtle. There is nothing wrong with sliders as such β the problem is that most people size the decision to the hatchling and discover the tank is too small several years later, by which point the animal has nowhere to go. Either way: releasing them is illegal, and both live for decades.