Porcupine Puffer

Porcupine Puffer (Diodon holocanthus)

The Porcupine Pufferfish is found in a diverse range of habitats, from rich, shallow reefs to open areas with rocky or soft, muddy substrates, extending to depths of 35 meters (115 feet). Juveniles are often seen among floating Sargassum rafts, while sub-adults form small groups, and adults are typically solitary. These nocturnal fish are not strong swimmers and feed on crabs, hermit crabs, mollusks, and sea urchins. Young Porcupine Puffers have a prominent spotty pattern on their bellies, whereas adults exhibit dark blotches on their backs with fewer spots as they age. This species is a favorite for fish-only marine aquariums due to its comical and friendly demeanor. Many owners report that these intelligent fish quickly recognize their keepers, often likening their interactions to those of “pet dogs” due to their engaging personalities and responses to visual stimuli. Given their potential size, a very large tank is required for adults. Although relatively gentle compared to other puffers, the Porcupine Pufferfish should still be considered semi-aggressive. In a sufficiently large tank, Porcupine Puffers can be kept in pairs or groups if all individuals are of similar size and added simultaneously. Suitable tankmates include large angelfish, tangs, and triggerfish. The aquarium should feature ample rockwork, large shelters, and open swimming spaces. Efficient filtration is essential to manage the fish’s substantial waste and voracious appetite, while water movement should be moderate. Note that large pufferfish are known for biting through tubing and heaters, so carefully consider equipment placement and monitor the fish during tank maintenance.