Diodon nicthemerus is a fascinating temperate water pufferfish species prized for its unique morphology and intriguing behaviour. This medium-sized puffer is best suited to experienced marine aquarists due to its specific care requirements and temperament.
Care Level: Moderate to advanced. This species requires stable temperate water conditions and a well-maintained aquarium.
Temperament: Generally semi-aggressive. It can be territorial, especially towards other puffers or slow-moving tankmates.
Diet: Carnivorous. Feed a varied diet including hard-shelled invertebrates such as molluscs and crustaceans to help wear down their continuously growing teeth. Frozen and live foods like shrimp, crab, and shellfish are recommended.
Minimum Tank Size: At least 150 litres (approximately 40 US gallons) to provide ample swimming space and territory.
Water Parameters: Maintain temperate marine conditions with temperatures between 18-22°C, salinity 1.020-1.025 SG, pH 8.1-8.4, and moderate water flow.
Compatibility: Best kept with robust, non-aggressive tankmates. Avoid small, slow fish or invertebrates that may be seen as prey.
Reef Safety: With Caution. May nip at invertebrates or corals, so not recommended for delicate reef systems.
Origin: Temperate marine waters (specific locality not provided).
Maximum Size: Approximately 25 cm (10 inches).
This species is a captivating addition to temperate marine aquaria, offering unique behaviour and appearance. Ensure a secure lid as puffers are known jumpers. Regular monitoring of water quality and diet is essential for long-term health.
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