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Hellbender
Cryptobranchus alleganiensis
The hellbender is a gigantic, fully aquatic salamander native to Appalachian streams. Known for its wrinkled skin used for respiration, it demands a massive 400L tank with fast, highly oxygenated, cold water.
Class:Amphibia
Order:Caudata
Family:Cryptobranchidae
Genus:Cryptobranchus
Species:Cryptobranchus alleganiensis
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Water Temperature
10 - 20 °C
pH Value
7 - 8.5
Environment
Freshwater
Humidity
100 %
Day temperature
10 - 20 °C
Night temperature
5 - 15 °C
UVB
None
Species description
Geographical Origin and Habitat: Endemic to the eastern United States, particularly the Appalachian region. It is a strictly aquatic, ancient salamander inhabiting fast-flowing, clear, and highly oxygenated cold rivers and rocky streams, sheltering under large boulders.
Taxonomy and Genetics: A massive, flattened aquatic salamander reaching 50–70 cm in length. The body is brown, gray, or black with dark spots. It exhibits abundant, loose folds of skin along the sides of the body used for cutaneous respiration, and lacks external gills as an adult.
Behavior and Habits: Nocturnal and strictly aquatic. It spends the day compressed under massive river rocks. At night, it walks along the riverbed to hunt crayfish and small fish. They are active year-round, even under ice during winter.
Morphology: Sexual dimorphism is very subtle: adult females are typically larger and heavier, while breeding males develop a swollen ring of glands around the cloaca.
Care, breeding and tankmates
Terrarium Setup: Strictly aquatic. Requires a massive aquarium of at least 120–150 cm in length (300+ liters). Provide strong water currents using powerheads or flow pumps to oxygenate the skin. Use large, smooth river pebbles or sand as substrate. A secure, tight-fitting lid is mandatory. Provide flat rock shelters.
Lighting and Heating: Cold water is vital. Maintain temperatures between 10–18°C. Temperatures above 22°C are lethal and cause rapid death. A professional aquarium water chiller is mandatory. Keep lighting dim, as they are sensitive to bright light.
Humidity and Hydration: Fully aquatic. Requires pristine, highly oxygenated water. Weekly large water changes (50%) and heavy filtration are necessary to handle their large waste output. Use high-quality water conditioners to remove all chlorine.
Feeding and Supplementation: Carnivorous and voracious. Feed whole fish, freshwater crayfish (a natural favorite that supports their jaw development), large earthworms, and nightcrawlers.
Compatibility: Territorial and cannibalistic. They will swallow any fish or amphibian that fits in their mouth. House individually or in massive enclosures with widely separated shelters.
Health and Common Diseases: Highly sensitive to warm temperatures and chemical pollution, which cause skin necrosis and respiratory distress. Poor water quality leads to ammonia toxicity. When stressed or handled, they secrete a thick, toxic white mucus. Never handle with bare hands.
Geographic Origin and Distribution
Endemic to the eastern United States, particularly the Appalachian region. It is a strictly aquatic, ancient salamander inhabiting fast-flowing, clear, and highly oxygenated cold rivers and rocky streams, sheltering under large boulders.
Origin
North America
Amphibian profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 73.66 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 73.66 cm. The AmphiBIO v1 source reports a maximum adult measurement of 73.66 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.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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