Eastern Mud Turtle — Care Sheet & Morphs

Husbandry requirements

Eastern Mud Turtle — origin: Southeastern United States (from the northeastern coastal plains down to Florida, and westward to Texas and the Mississippi Valley). Shallow wetlands, marshes, ponds and slow-moving ditches. Not listed under CITES, but keeping/collection regulations vary from state to state and country to country: favour captive-bred individuals..

Terrarium temperature gradient

Night min18 °C

Cool side22–24 °C

Warm side25–27 °C

Basking spot30–32 °C

Water temperature maintained at 22-26°C (guarded heater if needed). A dry hot spot (basking lamp) at 30-32°C above the platform is essential for basking and thermoregulation. A seasonal drop (mild overwintering around 10-15°C) can stimulate breeding in healthy, well-fed animals.

Enclosure (adult)

90 × 45 × 40 cm

Aquaterrarium / semi-aquatic tank with a land area and a basking platform

Recommended water volume of about 80 to 115 L per adult. Provide a secure lid or rim (a good climber, escape is possible), an easy-access beach/platform out of the water and hiding spots. A bottom-walker rather than a swimmer.

Humidity

60–90 %

A semi-aquatic species: air humidity is not a critical parameter. The key factor is water quality and temperature, not ambient humidity.

Substrate

Fine sandBare bottom, easy to cleanPotting soil/peat on the terrestrial nesting area

Avoid medium-sized gravel (risk of digestive impaction from ingestion). A fine sand bottom allows natural digging behaviour; the female needs a loose land area to lay her eggs.

UVB

Recommended

Yes. A UVB 5.0 tube or lamp (5-6%) above the basking area, replaced every 6 to 12 months. Essential for vitamin D3 synthesis, calcium absorption and shell health.

Water source

Always available

The heart of its habitat: dechlorinated and filtered water (filter matched to the volume), with regular water changes for impeccable quality. Moderate depth (about 1 to 2 times the width of the carapace) as it is a poor swimmer that walks along the bottom; provide shallow zones and easy exits/platforms to prevent drowning.

Origin

Kinosternidae

Southeastern United States (from the northeastern coastal plains down to Florida, and westward to Texas and the Mississippi Valley). Shallow wetlands, marshes, ponds and slow-moving ditches. Not listed under CITES, but keeping/collection regulations vary from state to state and country to country: favour captive-bred individuals.

Feeding & health

Diet

Omnivore with a carnivorous tendency — Insects, worms, snails and molluscs, crustaceans, small fish, amphibians, carrion; some plant matter/aquatic plants. Can be supplemented with quality aquatic-turtle pellets.

Forages on land more often than musk turtles. A varied diet; juveniles fed more frequently, adults 2-3 times/week. Provide calcium (cuttlebone) and do not overfeed to avoid obesity.

Breeding

Oviparous

Clutch 2–6 eggs/young. Hard-shelled eggs, laid on land; sometimes several clutches per year. Incubation of about 70 to 100 days at 26-30°C. Sex can be influenced by incubation temperature. Provide a loose, moist nesting substrate.

Health watch points

Shell rot (bacterial/fungal ulceration) linked to poor water quality
Osteodystrophy / soft shell from a lack of UVB, calcium or vitamin D3
Respiratory infections (water too cold, drafts, insufficient heating)
Hypovitaminosis A (swollen eyes, eyelid oedema, discharge)
Internal parasites and stress in wild specimens; egg retention (dystocia) in females

Morphs & genetics

Registry of 2 documented genes for Eastern Mud Turtle.

Hypomelanistic / Pastel light phaseDom
Albino (T-)Rec

Pairing calculator

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Eastern Mud Turtle × Eastern Mud Turtle

Probabilities per gene (independent loci).

Expected clutchSelect at least one gene on a parent.

Frequently asked questions

Answers to the most common questions about keeping the eastern mud turtle.

How big can the eastern mud turtle get?▾

The adult carapace typically measures 8 to 12 cm, with a maximum of about 15 cm in the largest specimens. Its smooth, domed shell lacks a keel in adulthood, and females are often slightly larger than males.

Can it be handled safely?▾

It's fairly docile but can turn grumpy and bite if handled too often: it's best to handle it sparingly. On the other hand, it's a hardy, adaptable species, less prone to drying out than musk turtles of the genus Sternotherus.

What water volume and enclosure should be provided?▾

Allow roughly 80 to 115 liters of water per adult, in an aquaterrarium of at least 90 x 45 x 40 cm that includes a land area and a basking platform. It's a good climber capable of escaping: provide a well-secured lid or rim, as well as hiding spots.

What water depth is suitable?▾

A moderate depth, roughly one to two times the width of the shell, works best: it's a bottom-walker rather than a swimmer. Provide shallow areas and easy access to the platform to avoid any risk of drowning.

What temperatures should be maintained?▾

Water is kept at 22-26 °C, with a warm side at 25-27 °C and a cool side at 22-24 °C; the dry basking spot above the platform should reach 30-32 °C for thermoregulation. A nighttime drop to 18 °C is tolerated.

Does this turtle need to be overwintered for breeding?▾

A moderate seasonal cooling, around 10-15 °C, can stimulate breeding in healthy, well-fed animals. However, this rest period only makes sense for animals in good condition, not for young or fragile individuals.

Is UVB necessary?▾

Yes, a UVB 5.0 (5-6%) tube or lamp should be placed above the basking area and replaced every 6 to 12 months. It's essential for vitamin D3 synthesis and calcium absorption, and therefore for shell health.

What does the eastern mud turtle eat?▾

Its diet is omnivorous with a carnivorous leaning: insects, worms, snails and molluscs, crustaceans, small fish, amphibians, and carrion, supplemented with a little aquatic vegetation. It forages on land more often than musk turtles; adults are fed 2 to 3 times a week, with calcium provided via cuttlebone.

What substrate should be chosen?▾

A fine sand bottom or a bare-bottomed tank both work well, supplemented with a patch of topsoil or peat on the land area so the female can lay eggs. Avoid medium-sized gravel, which risks causing digestive blockage if ingested.

How long does it live, and is it a major commitment?▾

Its lifespan is long, 30 to 50 years, making it a commitment spanning several decades that should be considered before acquiring one. Where possible, it's best to choose a captive-bred animal rather than a wild-caught one, which is more fragile and often carries parasites.

How does it reproduce?▾

It's oviparous and lays hard-shelled eggs, usually on land, sometimes with several clutches per year. Incubation lasts about 70 to 100 days at 26-30 °C, and sex can be influenced by incubation temperature; females can also suffer from egg retention (dystocia).

What are the most common health problems?▾

Shell rot linked to poor water quality is common, as is osteodystrophy from a deficiency in UVB, calcium, or vitamin D3. Respiratory infections from water that's too cold, hypovitaminosis A, and internal parasites in wild-caught specimens round out the main risks.

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