Porcupine Puffer - Diodon holocanthus
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The Porcupine Puffer (Diodon holocanthus) is a unique and intriguing marine fish known for its ability to inflate when threatened and its covering of sharp spines. With a mottled brown and cream pattern, it provides both visual interest and a natural predator deterrent in reef aquariums.
Common Name: Porcupine Puffer
Scientific Name: Diodon holocanthus
Family: Diodontidae
Size: Up to 12 inches (30 cm)
Temperament: Semi-aggressive
Difficulty: Moderate
Reef Safe: With caution
Native Region: Found throughout the Indo-Pacific, commonly inhabiting coral reefs and lagoons where it can forage among rocks and crevices.
Tank Size: Minimum of 75 gallons
Temperature: 74–82°F (23–28°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Provide a mix of sand and live rock for foraging and hiding; strong filtration recommended due to their large appetite and waste production.
• Diet: Carnivorous—feeds on snails, crustaceans, and other meaty foods; teeth may need trimming as they grow.
• Behavior: Can inflate when stressed; generally peaceful but may nip at smaller invertebrates or slow-moving tankmates.
• Tankmates: Best kept with robust, non-aggressive fish; avoid small or delicate invertebrates.
• Handling: Avoid direct handling due to sharp spines and potential toxins.