Species Description…

Scientific Name: Diodon holocanthus

Common Name: Long-Spined Pufferfish

Species Group: Pufferfish

Habitat: Reef Safe with Caution

Care Level: Advanced

Temperament: Predatory

Diet Type: Carnivore

Role in Aquarium: Predator

Max Fish Length: 14 (inches)

Min Aquarium Size: 100 (gallons)

Native Range: Indo-Pacific, including the Red Sea, the Gulf of Mexico, and the Caribbean

Diodon Holocanthus - The Long-Spined Pufferfish

Diodon Holocanthus (The Long-Spined Pufferfish)

Native to tropical and subtropical waters worldwide, commonly found in coral reefs, lagoons, and seagrass beds.
Recognized for its large, round body covered in long spines that erect when threatened.
A nocturnal species that becomes more active at night, using its strong jaws to feed on hard-shelled prey.
Despite its intimidating appearance, it is a relatively docile fish with a curious personality.
Best suited for aquariums with ample swimming space, stable water conditions, and a secure environment.

Carnivorous, primarily feeding on crustaceans, mollusks, and small fish in the wild.
Requires a varied diet including shellfish, squid, krill, and enriched frozen foods.
Has powerful beak-like teeth that continuously grow, necessitating hard foods like clams and snails to wear them down.
Should be fed multiple times per week with portion control to prevent overfeeding.
A high-protein diet ensures strong growth and maintains its vibrant coloration.

Prefers coral reefs and sandy-bottomed environments where it can hunt for food.
Frequently found near rocky formations and sheltered areas where it can rest during the day.
Aquarium setups should include open swimming areas and caves for hiding.
Requires high-quality filtration and stable water parameters to prevent stress and disease.
Providing a spacious environment helps support its active and inquisitive nature.

Optimal water temperature: 74-80°F (23-27°C) to maintain health and activity.
Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
Requires frequent water changes and strong filtration to handle its high waste output.
Not reef-safe, as it may consume invertebrates and disturb the substrate.
Providing a stress-free environment with plenty of swimming room supports its well-being.

Semi-aggressive and best housed with similarly sized, non-aggressive fish.
Compatible with large angelfish, tangs, and triggerfish, but not with small reef fish.
Should not be housed with very aggressive tankmates that may nip at its fins.
Best kept in a species-specific setup or a carefully selected community tank.
Providing plenty of swimming space and hiding spots reduces stress and territorial disputes.

An inquisitive and interactive species known for its unique personality.
Frequently observed using its strong jaws to crush shells and feed on hard-shelled prey.
More confident in a well-structured environment with hiding spots and open swimming areas.
Providing a diverse diet and environmental enrichment encourages natural behaviors.
Over time, it may recognize its caretaker and actively engage during feeding sessions.