Species profile · Emydidae

Clemmys guttata

Complete care sheet and morph genetics registry for the spotted turtle — husbandry parameters, diet, breeding and pairing calculator.

Polka-dot TurtleTortue ponctuéeTropfenschildkröteSpotty
Adult size
9–12 cm
Lifespan
30–65 yrs
Difficulty
Intermediate
Temperament
Diurnal
Activity
Diurnal
Reproduction
Oviparous
01

Husbandry requirements

Spotted turtle — origin: Eastern North America (southeastern Canada and the eastern United States), in peat bogs, marshes, ditches and slow, shallow watercourses..

Terrarium temperature gradient

Night min12 °C
Cool side18–22 °C
Warm side24–27 °C
Basking spot27–30 °C

A COOL-water turtle: overheating is dangerous (lethargy and aestivation above about 28°C in the water). Water kept at 18-22°C, a moderate basking spot at 27-30°C. A winter brumation (~5-10°C, several weeks) is beneficial and generally necessary for reproduction.

Enclosure (adult)
90 × 45 × 40 cm

Aqua-terrarium / semi-aquatic paludarium (shallow pool + dry land area with a basking spot).

Dimensions for one adult; enlarge for each additional individual. Shallow water (10-20 cm) with easy exits, a basking platform and a dry area are essential. A secure outdoor pond (protected from predators and escapes) is ideal in a temperate climate. PROTECTED SPECIES: listed in CITES Appendix II (since 2023) and classified as Endangered by the IUCN; protected in many US states. Keeping and trade are strictly regulated — acquire only captive-bred specimens with legal documents and NEVER take from the wild.

Humidity
60–80 %

A naturally humid environment owing to the aquatic part; humidity is not a critical parameter as long as the water stays clean and the dry area remains available.

Substrate
Fine sand (aquatic zone)Smooth rounded gravel (too large to be swallowed)Unfertilised soil / sphagnum moss (land and nesting zone)

Avoid any fine angular gravel or gravel of swallowable size (risk of impaction). Provide shallow areas, submerged supports (roots, plants) and easy access to the basking platform; these are weak swimmers.

UVB
Recommended

Yes — essential. A 5 % UVB tube (T5 ~5.0) above the basking area, replaced every 6-12 months; exposure to real sunlight (outdoor pond) is excellent. Necessary for vitamin D3 synthesis, bone mineralisation and shell health.

Water source
Always available

Clean, shallow water (10-20 cm), filtered and dechlorinated. Provide very shallow areas and easy exits (weak swimmers). Regular water changes: soiled water quickly causes shell rot and skin infections.

Origin
Emydidae

Eastern North America (southeastern Canada and the eastern United States), in peat bogs, marshes, ditches and slow, shallow watercourses.

02

Feeding & health

Diet

Carnivore / Omnivore — Earthworms, bloodworms, snails and aquatic invertebrates, insects, small larvae, tadpoles, carrion; supplemented with some aquatic plants.

Feeds preferentially in shallow water. Supplement with calcium/vitamins, vary the prey and avoid overfeeding (obesity is common in captivity). Adults fed 2-3 times a week.

Breeding
Oviparous

Clutch 2–6 eggs/young. Very small clutches (1-8 eggs, most often 2-6). Terrestrial laying in spring/early summer; incubation of about 70-83 days. Temperature-dependent sex determination (TSD). A winter brumation acts as a breeding trigger. Do not encourage reproduction without a legal framework (protected species).

Health watch points
  • Shell rot / ulcerative dermatitis (linked to poor water quality)
  • Respiratory infections (water too cold combined with draughts or an unheated platform)
  • Metabolic bone disease (UVB and/or calcium deficiency)
  • Hypovitaminosis A (vitamin A deficiency: oedema, eye problems)
  • Internal parasites, frequent and heavy in wild-origin specimens
03

Morphs & genetics

Registry of 2 documented genes for Spotted turtle.

  • Albino (T-) amelanisticRec
  • Hypomelanistic / Mahogany light phaseDom
04

Pairing calculator

Pick each parent's genotype — clutch probabilities update live. Free, no sign-up.

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Spotted turtle × Spotted turtle

Probabilities per gene (independent loci).

GeneParent AParent B
Expected clutchSelect at least one gene on a parent.
05

Frequently asked questions

Answers to the most common questions about keeping the spotted turtle.

How big does an adult Spotted turtle get?
An adult Spotted turtle typically measures 9–12 cm (adult carapace length. one of the smallest turtles in the world; females often have a more domed shell, males a longer and thicker tail.).
What temperature and humidity does a Spotted turtle need?
A gradient of roughly 18–22 °C on the cool side to 24–27 °C on the warm side, with a basking spot of 27–30 °C. Humidity 60–80 %.
What does a Spotted turtle eat?
Carnivore / Omnivore: Earthworms, bloodworms, snails and aquatic invertebrates, insects, small larvae, tadpoles, carrion; supplemented with some aquatic plants..
Is the Spotted turtle a good reptile for beginners?
Intermediate level. Lively, curious and intelligent; not very shy. Actively patrols shallow water in search of food and quickly recognises its keeper. Plan ahead: a lifespan of 30–65 yrs.

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