Hard Shell Porcupine Pufferfish (Diodon holocanthus)
Reef compatible – No
Care level – Intermediate
Disposition – Semi-aggressive
Min. tank size – 75 gallons
Mature size – 20 inches
Product Specifications
| Feature | Detail |
|---|---|
| Species | Diodon holocanthus |
| Size (Adult) | 20 inches |
| Minimum Tank Size | 75 gallons |
| Compatibility | Not reef compatible |
| Aggression Level | Semi-aggressive |
| Difficulty Level | Intermediate |
FAQ
Is the porcupine pufferfish safe to keep with other fish?
Due to its semi-aggressive nature, it should not be kept with small or slow-moving fish. It may pose a threat to species with weak defenses or small size.
What is the expected growth rate of this pufferfish?
The pufferfish reaches a mature size of 20 inches over time, typically growing steadily in a properly sized tank with stable conditions.
Can this species be kept in a community tank with corals?
Please contact customer service

Melanie Manning –
The porcupine pufferfish is a striking addition to my 75-gallon tank. It’s active and curious, though I’ve had to keep it separate from small fish. The hard shell makes it look impressive and it’s not aggressive toward larger tank mates. Needs a stable environment and regular water testing.
Dorothy Ball –
I’ve kept this pufferfish for over a year now. It’s semi-aggressive but not destructive. I’ve had to monitor its behavior closely, especially during feeding. The tank size is essential, and I’m glad I followed the minimum size recommendation.
Robert Brown –
It’s a unique species with a bold appearance. However, it’s not ideal for beginners. I noticed it occasionally nips at smaller fish, so I’ve rearranged the tank layout to reduce risks. Overall, it’s a good fit for intermediate aquarists.