“Pufferfish can swallow water or air to puff into a spiky ball.”
The Guinea fowl pufferfish is a spotted Indo-Pacific reef fish that grazes coral, algae, sponges, and invertebrates. It inflates when cornered, and some tissues can contain tetrodotoxin.
By An Nguyen · Published · Updated
Arothron meleagris Tetraodontiformes Tetraodontidae
Measured against the 176 species profiled on this site. Each figure is converted to one unit system from the published range on the page, so the ranks are computed, not quoted.
| Measure | This species | Rank here | Exceeds |
|---|---|---|---|
| Body mass | 1.8 kg | #128 of 176#5 of 13 Actinopterygii | 27% |
| Body length | 30.5 cm | #146 of 176#9 of 13 Actinopterygii | 17% |
| Lifespan in the wild | 10 yr | #130 of 169#9 of 13 Actinopterygii | 20% |
Closest in body mass
Ranks use the upper end of each published adult range, so they compare typical large adults rather than records, and metrics with no published number are left out rather than estimated. The full table is downloadable from the species dataset, and any two species can be put side by side in the comparison tool.
Browse photographs of arothron meleagris across habitat, behavior, anatomy, and life stages.
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Core article
A closer look at habitat, diet, behavior, reproduction, and conservation.
The pufferfish is a round-bodied, slow-swimming reef fish that inflates into a rigid, spiny sphere when threatened, making it harder for a predator to swallow. The Guinea fowl pufferfish (Arothron meleagris) has white spots on a dark background, resembling the plumage of the bird it is named for. Some tissues can contain tetrodotoxin, a potent neurotoxin, so wild pufferfish should not be treated as safe food.
The Guinea fowl pufferfish is medium-sized, 8 to 12 inches and 2 to 4 pounds, and hovers with small pectoral fins in a slow, maneuverable style, lacking pelvic fins and carrying its dorsal and anal fins set far back near the tail. Its inflation mechanism depends on an expandable stomach: when stressed or grabbed, the fish gulps water (or air, out of water) through a valve at the base of its mouth. Because its spine is flexible and it has no ribs, the tough, leathery, scaleless skin stretches into a rigid sphere and raises normally hidden spines. The family name Tetraodontidae ("four teeth") refers to the jaws — fused into a solid beak, split by a suture top and bottom — driven by strong muscles to crush the shells and exoskeletons of hard reef prey. The Guinea fowl puffer can also switch color, from the spotted dark "guinea fowl" phase to a solid golden-yellow one, likely for camouflage or social signaling. Its short, stiffened body reflects selection in complex reefs favouring maneuverability and defense over speed, in the order Tetraodontiformes.
Guinea fowl pufferfish and their relatives range across warm Indo-Pacific waters and along the coasts of the Americas, Africa, and Asia, with populations recorded in Mexico, Ecuador (notably the Galápagos), Indonesia, the Philippines, and Japan. They live on shallow coral reefs, rocky inshore reefs, and adjacent seagrass beds, where the reef's crevices and caves shelter them from open-water predators like sharks and support the bottom-dwelling invertebrates they eat, generally staying in clear, sunlit water where they can inspect the reef by eye.
Guinea fowl pufferfish are reef-foraging omnivores, their beak letting them process food that many fish cannot. Hovering on their pectoral fins and inspecting the coral visually, they bite tips from branching coral, graze algae and sponges, and crush mollusks and other small invertebrates. FishBase records coral tips as the main food, with sponges, mollusks, tunicates, algae, and detritus also taken; that mixed menu is why a simple carnivore label is misleading. Slow-moving, they rely on vision and jaw force rather than speed. Inflation and tetrodotoxin are separate defenses: one makes the fish difficult to swallow, while the other makes certain tissues toxic to eat.
Pufferfish are generally solitary and can be territorial, not forming schools or cooperative groups, and outside the mating season an individual may chase other puffers from its foraging patch. Large, independently mobile eyes let it monitor the reef as it swims, and it forages along the bottom by day and retreats into tight crevices at night to avoid nocturnal predators. Its signature defense — puffing up — is physiologically demanding and stressful, used only when the fish is cornered or seized by a shark or grouper, and once the threat passes it slowly expels the water and returns to shape.
The Guinea fowl pufferfish reproduces by open-water broadcast spawning rather than nest-building. In the breeding season males and females gather in the water column above the reef, and after a brief courtship the female releases many tiny buoyant eggs into the ocean currents, where the male fertilizes them. There is no parental care: the eggs drift in the pelagic zone as zooplankton, and after hatching the microscopic larvae ride the currents feeding on plankton before metamorphosing and settling onto the reef as juveniles — a drifting larval stage that spreads the species across reef systems. Puffers that survive the high-mortality early stages can live 10 years or more.
The Guinea fowl pufferfish is Least Concern with a stable global trend, its wide Indo-Pacific range buffering local threats; its toxicity deters some predators and limits food fishing, though it is collected for the specialty aquarium trade. Still, the species depends on coral reefs for shelter and food, and climate-driven ocean warming and acidification drive mass coral bleaching that strips both hiding places and invertebrate prey, while dynamite and cyanide fishing, agricultural runoff, and coastal pollution degrade the reef bottom it lives on.
Kingdom
Animalia
Phylum
Chordata
Class
Order
Tetraodontiformes
Family
Tetraodontidae
Genus
Arothron
Species
A. meleagris
Pufferfish can swallow water or air to puff into a spiky ball.
Many pufferfish carry toxins that make them dangerous to eat.
Their teeth are fused into a beak for crunching hard foods.
Guinea fowl pufferfish can change between darker and lighter colors.
Pufferfish are also called blowfish or toadfish by some people.
They move slowly unless startled.
Select a question to reveal the answer.
Pufferfish puff up to look too large for predators to swallow easily.
Many pufferfish contain strong toxins in their skin and organs. They should never be eaten unless prepared by trained experts.
Guinea fowl pufferfish live on coral reefs in the Pacific and Indian oceans, including Mexico and the Galápagos.
They eat algae, sponges, and small invertebrates found on reefs.
Yes. Pufferfish are fish with fins and gills, even though they can inflate like a balloon.
Guinea fowl pufferfish are listed as Least Concern, but reef damage threatens many reef animals.
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