Description
The Argentine Sideneck Turtle is a robust, semi-aquatic reptile for intermediate to advanced keepers seeking a long-lived, interactive species. Known for its distinctive neck retraction and hardy nature, this turtle has become a consistent reorder item for us since January 2026, with zero warranty claims in over a year of sales.
Stand-Out Features
- Distinctive Sideneck Anatomy: Retracts its head horizontally under the shell’s edge, unlike most North American species.
- Proven Durability: A hardy species known for strong captive longevity with proper care.
- Interactive Personality: Often becomes responsive to its keeper, showing clear feeding and basking behaviors.
- Semi-Aquatic Design: Requires a substantial aquatic setup with ample, dry basking area for proper thermoregulation.
- Omnivorous Diet: Accepts a varied diet of high-quality commercial pellets, leafy greens, and occasional protein like earthworms or shrimp.
Technical Data
| Common Name | Argentine Sideneck Turtle |
| Scientific Name | Phrynops hilarii |
| Adult Carapace Length | 10-12 inches |
| Lifespan (Captive) | 25+ years |
| Temperament | Generally docile, can be shy |
| Water Temperature | 75-80°F |
| Basking Temperature | 85-90°F |
| Weight (measured) | 2.9 oz |
Your Questions Answered
What size enclosure does this turtle need?
Start with a 40-gallon breeder for a juvenile. An adult requires a minimum of a 75-gallon aquarium or a custom 100+ gallon stock tank. The setup must be mostly water with a large, secure basking platform.
Is this a good turtle for a beginner?
This species is better suited for keepers with some reptile experience. Their specific aquatic and basking requirements, potential size, and long-term commitment make them an intermediate-level pet.
How do you handle their specific neck retraction?
Never pull on the head or limbs. Support the turtle fully from underneath. If it retracts, wait calmly; applying pressure can cause injury. They typically relax and extend their neck after a short period of secure handling.
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