Staurotypus salvinii

Heavily filtered aquatic tank / aquaterrarium for an aquatic species

Indicative minimum for a single adult (approx. 250-300 L of water); provide larger for a pair or a big male. Water depth of at least 30-40 cm allowing the animal to reach the surface by stretching its neck. Solid, weighted lid: a powerful, escape-prone species. Oversized filtration is essential (abundant waste from a carnivore).

Aquatic species: air humidity is not the critical parameter; WATER QUALITY takes priority. Humid ambient air above the tank.

Avoid any gravel of ingestible size (risk of impaction). A bare-bottom tank greatly simplifies maintenance given a carnivore's organic load. Provide hides (roots, stable rocks) and shaded areas, as this is a nocturnal species.

Beneficial but not vital: a nocturnal/aquatic species with moderate UVB needs. A low to medium UVB tube (index 5-6 / ~5 %) above the dry beach supports calcium metabolism. Failing that, supplement with vitamin D3 and take care with the diet.

The animal's main habitat: clean, dechlorinated water at 24-27 °C, depth ≥ 30-40 cm. Powerful mechanical and biological filtration, regular partial changes (25-50 %/week depending on load), monitoring of ammonia/nitrites (ideally 0) and nitrates. Poor water quality is the leading cause of shell pathologies.

Pacific slope of southern Mexico (Chiapas, Oaxaca) through Guatemala and El Salvador; slow rivers, lagoons and coastal marshes.

Carnivore / Molluscivore — Snails, mussels and bivalves, crayfish, crabs, shrimp, whole fish, worms, aquatic insects, carrion; quality carnivore pellets as a supplement.

Regularly provide hard-shelled prey (snails, mussels, whole crayfish) to wear down the powerful beak and prevent its overgrowth. Ration adults (risk of obesity). Supplement with calcium; cuttlebone available.

Clutch 6–12 eggs/young. A notable trait: genetic sex determination (XX/XY chromosomal system) and NOT by temperature, unlike most turtles. Laying in a loose substrate out of the water; artificial incubation at ~27-29 °C over about 150-190 days. A slight seasonal cooling stimulates breeding. Separate the adults outside of mating (aggressiveness).

• Shell diseases (shell rot / ulcers) linked to poor water quality
• Respiratory infections (water too cold, drafts)
• Hypovitaminosis A (vitamin A deficiency: oedema, eye damage)
• Metabolic bone disease (calcium/UVB deficiency, soft shell)
• Beak overgrowth and injuries/stress linked to aggression between individuals