Spotted Salamander

Geographical Origin and Habitat: Widely distributed throughout eastern North America, from eastern Canada down to the southeastern United States. It is a strictly fossorial species, spending most of the year deep underground in leaf litter, rodent burrows, or under rotting logs in deciduous forests. They emerge only at night during early spring rains to migrate to breeding pools.

Taxonomy and Genetics: A member of the Ambystomatidae family, commonly known as mole salamanders. It features a robust, cylindrical body and a broad snout. A unique biological aspect is its symbiotic relationship with green algae (Oophila amblystomatis), which grows inside the egg envelopes and even within embryonic tissue, providing oxygen to the developing embryos.

Behavior and Habits: Highly secretive and fossorial, remaining hidden underground for most of the year. During the spring, they migrate in large numbers to vernal pools to breed. In captivity, they remain buried under substrate or moss, emerging at night to hunt. They feed by seizing prey with their wide jaws.

Morphology: A large salamander, reaching 15 to 25 cm in length, and capable of living for over 20 years. Females are generally larger, wider, and heavier than males, particularly when gravid. During the breeding season, males exhibit a swollen cloaca.

Terrarium Setup: Requires a spacious terrestrial enclosure (minimum 60x40 cm). The substrate is the most important element and should consist of a thick layer (15-20 cm) of damp organic soil, peat moss, and sphagnum moss covered with leaf litter to allow digging. Include cork bark tunnels and half-buried shelters.

Lighting and Heating: Adapted to cool climates. Temperatures must be kept low, ideally between 15 and 20°C. They are highly sensitive to heat; temperatures exceeding 24°C can cause severe thermal stress and death. No special lighting is required, as they are nocturnal and subterranean.

Humidity and Hydration: Keep the substrate consistently damp (around 70-80% humidity) but not muddy. Provide a shallow water dish with clean, declorinated water, which should be changed daily. Good ventilation is necessary to prevent mold growth and bacterial skin issues.

Feeding and Supplementation: Feeds on a variety of invertebrates, with earthworms being the staple diet. They also consume crickets, roaches, and waxworms. Food should be dusted with calcium and vitamins containing D3 once a week for adults.

Compatibility: Solitary and docile. They can be housed individually or in small groups if ample hiding spots are provided. Avoid housing them with different species, and ensure tankmates are of similar size to prevent cannibalism of smaller individuals.

Health and Common Diseases: Highly sensitive to skin absorption of chemicals and toxins. Never handle them with bare hands, as skin oils, soaps, or lotions can be lethal. They are prone to fungal infections and bacterial dermatosis if the enclosure is kept too dirty or warm.