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Marbled Salamander
Ambystoma opacum
The marbled salamander is a stout, terrestrial species known for silvery-white crossbands and unique fall breeding. It needs a 75L woodland terrarium with deep, moist substrate for burrowing and an invertebrate diet.
Class:Amphibia
Order:Caudata
Family:Ambystomatidae
Genus:Ambystoma
Species:Ambystoma opacum
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Environment
Terrestrial
Humidity
70 - 80 %
Day temperature
18 - 22 °C
Night temperature
12 - 16 °C
Ambient temperature
18 - 22 °C
Minimum enclosure
>= 40 L
UVB
Low
Species description
Geographical Origin and Habitat: Native to deciduous forests, floodplains, and seasonal wetlands of the eastern United States, ranging from southern New England to eastern Texas and northern Florida. Primarily terrestrial, it lives under leaf litter, logs, or rocks in moist environments.
Taxonomy and Genetics: A stocky and robust salamander, reaching 10–12 cm in length. The body is dark, marked with a striking white or silvery-grey marbled pattern. Males have brighter white bands, while females have greyish-white bands. The head is broad and the tail is relatively short and thick.
Behavior and Habits: Solitary, secretive, and highly fossorial. It spends most of its life underground, emerging on cool, rainy autumn nights to hunt or migrate. It is a nocturnal predator feeding on earthworms, insects, and other small invertebrates.
Morphology: Sexual dimorphism is visible during the breeding season: males exhibit bright, contrasting chalk-white dorsal bands and a swollen vent, while females have more muted silvery-grey bands and are wider due to carrying eggs.
Care, breeding and tankmates
Terrarium Setup: Require a terrestrial forest terrarium of at least 60x40x30 cm. Provide a deep, diggable substrate (at least 10–15 cm) of peat moss, coconut fiber, and sphagnum moss. Cover the surface with sterilized oak leaf litter and flat pieces of cork bark or stones for shelters.
Lighting and Heating: Prefer cool, temperate conditions. Ideal temperature range is 15–20°C. They are highly sensitive to heat; temperatures above 24°C can be fatal. A nighttime temperature drop is beneficial. Provide low-level UVB lighting (2–5%) or keep the enclosure shaded.
Humidity and Hydration: Maintain relative humidity at 70–80% with regular misting. The substrate should be moist but never soggy or waterlogged to prevent bacterial infections. Always use dechlorinated water. Provide a very shallow water dish.
Feeding and Supplementation: Voracious predators. Offer live prey such as earthworms, small roaches, and crickets. Dust insects with high-quality calcium and vitamin D3 supplements once or twice a week to support bone structure.
Compatibility: Generally peaceful with their own species and can be kept in small groups if plenty of space and hiding spots are provided. Avoid keeping them with much smaller tankmates, as cannibalism can occur.
Health and Common Diseases: Heat stress is the most critical threat. Do not handle them with bare hands; human skin oils, soap residues, and body heat can damage their respiratory skin and cause fatal shock. Watch for signs of lethargy, skin lesions, or fungal infections.
Geographic Origin and Distribution
Native to deciduous forests, floodplains, and seasonal wetlands of the eastern United States, ranging from southern New England to eastern Texas and northern Florida. Primarily terrestrial, it lives under leaf litter, logs, or rocks in moist environments.
Origin
North America
Amphibian profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 12.7 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Toxicity
- No verified data available
- Life stage
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 12.7 cm. The AmphiBIO v1 source reports a maximum adult measurement of 12.7 cm for this species, recorded as total length (TL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
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Licensed images linked to the species or, when marked, to the closest representative taxon.
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