---
type: species
title: "Porcupine Pufferfish Care: The Complete Guide to Diodon holocanthus"
slug: "porcupine-pufferfish"
category: "saltwater"
scientificName: "Diodon holocanthus"
subcategory: "Pufferfish"
lastUpdated: "2026-04-26"
readingTime: 12
url: https://www.fishstores.org/species/porcupine-pufferfish
---

# Porcupine Pufferfish Care: The Complete Guide to Diodon holocanthus

*Diodon holocanthus*

Master Porcupine Pufferfish care. Learn about the 100+ gallon tank requirements, beak trimming, and the best diet for these water puppies.

## Species Overview

The porcupine pufferfish (*Diodon holocanthus*) is the saltwater fish that makes hobbyists fall in love with the wrong species. With huge expressive eyes, a permanent grin, and the disconcerting habit of swimming up to the glass to track you across the room, this is the most personable fish you can keep in a marine tank. Owners universally describe them as "water puppies," and the comparison is not exaggerated. They learn faces, beg for food, and will let trusted keepers hand-feed them.

The catch is that this charisma comes packaged in a 12-to-15-inch carnivore with a beak that grows continuously, a bioload that overwhelms undersized filtration, and a copper sensitivity that rules out the most common marine ich treatments. A porcupine puffer is a 10-to-15-year commitment to a fish that will outgrow most starter saltwater setups within two years. Buy one on impulse and you will be rehoming it before it reaches adult size.

| Field       | Value                        |
| ----------- | ---------------------------- |
| Adult size  | 12-15 in (30-38 cm)          |
| Lifespan    | 10-15 years                  |
| Min tank    | 100 gallons (125-150 better) |
| Temperament | Semi-aggressive, personable  |
| Difficulty  | Intermediate                 |
| Diet        | Hard-shell carnivore         |

### Identifying *Diodon holocanthus* vs. Spiny Boxfish

The porcupine pufferfish is frequently confused at retail with the spiny boxfish (*Chilomycterus schoepfii*) and the closely related spot-fin porcupinefish (*Diodon hystrix*). All three are sold under loose names like "porcupine puffer" or "balloonfish," and the wrong ID means the wrong adult size.

True *Diodon holocanthus* — sometimes called the long-spine porcupinefish — has spines that lay flat against the body when the fish is calm and stand fully erect only when it inflates. The body is sandy tan to olive with darker brown blotches and a lighter belly, and the spines along the dorsal surface are notably long when erect. *Diodon hystrix* looks similar but reaches 35+ inches in the wild and has shorter, more numerous spines that are partially erect even at rest. Spiny boxfish have a more rectangular body profile and shorter spines all around. If the spines are visible and erect on a calm fish in the dealer tank, it is not *D. holocanthus*.

Confirm the ID before you buy. A 100-gallon tank that comfortably holds a 15-inch *D. holocanthus* will not hold a 30-inch *D. hystrix*, and rehoming a 24-inch puffer is far harder than you would expect.

### The "Water Puppy" Personality and Intelligence

Porcupine puffers are among the smartest fish in the marine hobby. They will recognize the keeper who feeds them within a few weeks, swim to the front of the tank when that person enters the room, and learn to associate specific containers or tools with feeding. Owners commonly report their puffers learning to puff (without inflating) when held away from food, spitting water at the surface to get attention, and developing genuine preferences between similar foods.

This intelligence cuts both ways. A bored porcupine puffer will entertain itself by rearranging your aquascape, biting heater cords, and harassing tank mates that fit in its mouth. Provide enrichment in the form of varied foods, live rock structure to explore, and at least 5 feet of horizontal swimming length, and the personality stays charming. Skimp on space and stimulation, and you end up with a frustrated 12-inch fish destroying everything it can reach.

> **The fish recognizes you, not your shirt**
>
> Porcupine puffers track movement and faces, not clothing. New keepers sometimes assume the fish is begging at every visitor; in reality it is greeting whoever it has cataloged as the food source. This bond is real, durable, and one of the reasons rehoming an established puffer is so stressful for the animal.

### Maximum Size (12-18 inches) and Lifespan (10-15 years)

In home aquaria, *Diodon holocanthus* reliably grows to 12-15 inches over 4-6 years on a healthy diet. Wild specimens hit 18 inches but are uncommon at that size. The growth curve is front-loaded: a 4-inch juvenile will double in length within the first 18 months in a properly sized tank, then slow as it approaches the 10-12 inch range.

Lifespan in well-maintained captivity is 10-15 years, with public aquaria documenting individuals past 20. The most common premature deaths are not old age — they are nutritional disease (jaw lock from soft-only diets), ich treatments gone wrong (copper sensitivity), or air-induced bloat from a careless transport. None of these are unavoidable; all of them require the keeper to think about the species' specific physiology rather than treating it like a generic saltwater fish.

## Water Parameters & Tank Requirements

Porcupine puffers are not delicate about water chemistry, but they are unforgiving about tank size and filtration capacity. Their bioload, swimming requirements, and adult dimensions push the floor for a permanent home well past what most hobbyists initially plan for.

### Minimum Tank Size: Why 100+ Gallons is Non-Negotiable

A 100-gallon tank is the absolute floor for a single adult *Diodon holocanthus*, and a 125-150 gallon system (a standard 6-foot tank) is what experienced puffer keepers actually recommend. The footprint matters more than the volume — a 6-foot length lets a 14-inch fish make a meaningful turn without bumping rockwork on every pass. A 75-gallon tank, no matter how tall or wide, leaves an adult puffer pacing in tight figure-eights against the glass.

Juveniles under 4 inches can grow out in a 55-75 gallon for the first year, but the upgrade is mandatory, not optional. If you cannot commit to a 125-gallon system within 18 months of purchase, do not buy this species. Plan the long-term build around the puffer; do not try to plan the puffer around your existing tank.

The horizontal length is the constraint that gets ignored. Two 6-foot tanks of the same volume will hold a porcupine puffer very differently if one is wider front-to-back than the other. Puffers swim in long, deliberate laps and benefit from genuine swimming corridors, not just gross water volume.

> **Cute juveniles grow into 14-inch fish faster than you think**
>
> A 4-inch porcupine puffer at the LFS will reach 8-10 inches within 12 months of healthy feeding. The most common rehoming reason in this species is not behavior or aggression — it is owners realizing too late that the puffer outgrew the only tank they own. Build the adult tank first, buy the juvenile second.

### Heavy Filtration: Managing High Bio-load with Protein Skimmers

Porcupine puffers are messy eaters. They tear apart clam shells, spit shell fragments back into the water column, and produce notably large waste loads for their size. Filtration has to be sized for at least double the calculated bioload of a typical 12-inch fish.

The non-negotiable equipment list for an adult porcupine puffer:

- An oversized protein skimmer rated for at least 1.5x your display volume. A skimmer rated for 200 gallons is appropriate for a 125-gallon puffer tank.
- A sump with refugium space for chemical media, mechanical filter floss, and macroalgae like chaetomorpha for nutrient export.
- A return pump and circulation pumps providing 10-20x display turnover, with the circulation broken into multiple smaller powerheads to avoid blasting the puffer in any one direction.
- A filter sock or roller mat changed at least twice weekly to capture the food debris puffers generate.

Weekly water changes of 15-20% are the floor for a single-puffer system. Skip a change and nitrate creeps fast. Skip a month and you will see the puffer's color dull, its appetite drop, and its breathing rate climb at the front glass.

### Specific Gravity (1.020-1.025) and Temperature (74-80°F)

*Diodon holocanthus* tolerates a wider parameter range than most reef fish, which is part of the reason the species is so frequently mis-stocked into undersized FOWLR setups. The targets:

| Parameter        | Target            | Notes                                         |
| ---------------- | ----------------- | --------------------------------------------- |
| Temperature      | 74-80°F (23-27°C) | Stable matters more than the exact target     |
| Specific gravity | 1.020-1.025       | 1.024 is the standard FOWLR target            |
| pH               | 8.1-8.4           | Test alongside alkalinity, not in isolation   |
| Ammonia          | 0 ppm             | Anything detectable is an emergency           |
| Nitrite          | 0 ppm             | Same — fully cycled tank only                 |
| Nitrate          | Under 20 ppm      | Hard to maintain without skimmer + macroalgae |
| Alkalinity       | 8-11 dKH          | Important for biological filter stability     |

Pufferfish are scaleless, which means they absorb dissolved compounds (medications, copper, organics) more aggressively than scaled fish. That is the single biggest physiological constraint on how you maintain the tank — every dose, additive, and chemical treatment hits a porcupine puffer harder than it would hit a tang or angelfish in the same display.

## Diet & Feeding

Diet is where most porcupine puffer deaths originate. The species has continuously growing teeth (a fused beak made of four interlocking dental plates) that must be ground down through hard food. Feed soft-only foods like silversides and frozen mysis exclusively, and within 12-18 months the beak will overgrow until the fish physically cannot close its mouth — a condition called lockjaw. Lockjaw is fatal without intervention and is almost entirely preventable.

### Hard-Shelled Foods: Preventing Beak Overgrowth

Hard-shelled prey is the single most important element of porcupine puffer husbandry. The fish evolved to crush sea urchins, hermit crabs, and small mollusks; the hard exoskeletons grind the beak as the fish chews. Without that mechanical wear, the beak grows roughly 1-2mm per month and exceeds functional length within a year.

Required staples for at least 50% of feedings:

- Whole clams or mussels still in the shell (frozen, thawed before feeding)
- Unpeeled fresh or frozen shrimp with the shells fully intact
- Whole crab pieces or small whole crabs (silver-sides crab, sand crab, freshwater crayfish chunks)
- Cuttlebone fragments anchored to a feeding clip — many puffers will gnaw on the cuttlebone between meals

A cuttlebone tile in the tank is the simplest insurance against overgrowth. Anchor a 2-inch chunk to a piece of rockwork with a stainless clip and let the puffer self-trim. It will not eliminate the need for hard-shell foods, but it adds passive wear between meals.

> **Feeding silversides as a daily staple**
>
> Frozen silversides, mysis shrimp, and krill are convenient and most pufferfish accept them eagerly — which is exactly why they are over-fed. None of these provide enough mechanical resistance to wear the beak. A silversides-only diet will produce visible beak overgrowth within 6-9 months. Use these as supplements, not as the base of the rotation.

### Best Foods: Clams, Mussels, Krill, and Ghost Shrimp

A solid weekly rotation for an adult porcupine puffer:

- 2x per week: Whole clams or mussels on the half-shell (place shell-side-down on the substrate so the puffer has to work for the meat)
- 2x per week: Unpeeled frozen shrimp, krill with shells, or whole squid pieces
- 1x per week: Live or thawed [ghost shrimp](/species/ghost-shrimp), small crayfish, or freshwater feeder shrimp for variety and enrichment
- 1x per week: A high-quality frozen carnivore preparation (mysis, brine, or formula one) to balance vitamins
- 1 fasting day per week — adults benefit from a digestive break

Variety matters as much as content. Puffers will fixate on a single preferred food and refuse everything else if you let them. Rotate aggressively from week one and the fish will accept the full menu through adulthood.

### Vitamin Supplements and Feeding Schedules for Juveniles vs. Adults

Soak frozen foods in a vitamin supplement (Selcon, VitaChem, or equivalent) at least twice weekly. Pufferfish are particularly responsive to vitamin C and HUFA (highly unsaturated fatty acids) supplementation — well-supplemented fish show brighter eye color, better fin condition, and stronger immune resilience to ich and velvet exposure.

Feeding schedules diverge sharply between life stages:

- Juveniles (under 6 inches): Feed twice daily, small portions, 5-7 days a week. Their growth rate demands constant calorie input.
- Sub-adults (6-10 inches): Feed once daily, larger portions, 6 days a week with one fasting day.
- Adults (10+ inches): Feed once every other day, substantial portion, with regular fasting days. Adult puffers fed daily quickly develop fatty liver disease.

Watch the belly profile, not the begging behavior. A puffer with a visibly rounded belly is well-fed; a puffer with a distended, drooping belly is overfed and at risk for organ damage. They will beg constantly regardless of how full they are.

## Tank Mates & Compatibility

Porcupine puffers are semi-aggressive but not territorially aggressive in the way damsels or triggers are. The compatibility problem is mechanical: anything small enough to fit in a puffer's mouth becomes food, and anything with a fleshy mantle or tube foot becomes a chew toy.

### Why They Are Not Reef Safe (Coral and Invert Risks)

A porcupine puffer is categorically not reef-safe. The list of inverts they will destroy includes:

- All ornamental shrimp ([cleaner shrimp](/species/skunk-cleaner-shrimp), [peppermint shrimp](/species/peppermint-shrimp), camel shrimp, harlequin shrimp)
- Hermit crabs of all sizes — they crush the shells to extract the crab
- Snails — including [turbo snails](/species/mexican-turbo-snail), [nassarius](/species/nassarius-snail), and trochus
- Small crabs — emerald crabs and arrow crabs both end up as snacks
- Feather dusters, coco worms, and any sessile invertebrate with exposed soft tissue
- Clam mantles, including tridacna species
- LPS corals (the puffer will sample fleshy polyps; some specimens leave SPS alone, but it is a coin flip)

The right setup for a porcupine puffer is a Fish Only With Live Rock (FOWLR) tank — live rock for biological filtration, sand or bare-bottom substrate, no inverts, no corals. Macroalgae like chaetomorpha can be kept in a sump refugium for nutrient export, but display-tank algae or seagrass is fair game for the puffer to graze.

For a broader picture of FOWLR vs. reef trade-offs, see our [saltwater aquarium guide](/guides/saltwater-aquarium).

### Choosing Semi-Aggressive Tank Mates (Tangs, Triggers, Large Angels)

Compatible tank mates share three traits: large enough to not be eaten, fast enough to claim feeding-time food, and not so aggressive that they bully the puffer at feeding time. Workable options for a 180+ gallon system:

- Larger tangs: [yellow tang](/species/yellow-tang), [naso tang](/species/naso-tang), [sailfin tang](/species/sailfin-tang), [purple tang](/species/purple-tang)
- Most triggerfish: [niger triggerfish](/species/niger-triggerfish), [picasso triggerfish](/species/picasso-triggerfish) (avoid clown triggers — too aggressive long-term)
- Large angelfish: [koran angelfish](/species/koran-angelfish), [emperor angelfish](/species/emperor-angelfish), [queen angelfish](/species/queen-angelfish)
- Other puffers: a single dogface or stars-and-stripes can co-exist if added simultaneously and given a 200+ gallon system
- [Snowflake moray eel](/species/snowflake-moray-eel) — peaceful, non-competitive, and immune to puffer toxins

Add tank mates before or simultaneously with the puffer when possible. An established puffer treats new arrivals as either food or competition; an established tank with the puffer added last gives existing fish the territorial advantage.

### Avoiding Fin-Nippers and Small "Snack-Sized" Fish

Avoid these categories entirely:

- Anything small enough to swallow whole — [chromis](/species/blue-green-chromis), [cardinalfish](/species/banggai-cardinalfish), [firefish](/species/firefish-goby), small wrasses, gobies under 3 inches
- Fin-nippers like sixline wrasses or aggressive damsels (the puffer's slow, exposed fins are easy targets)
- Slow-moving competitors that lose every feeding contest — long-snout butterflies, copperband butterflies, scribbled angelfish
- Lionfish or scorpionfish — the puffer may try to bite them, with disastrous outcomes for both fish

When in doubt, oversize the tank mate rather than undersize it. A puffer that ignores a 6-inch tang will absolutely sample a 3-inch one.

## Common Health Issues

Porcupine puffers get sick like any other marine fish, but their copper sensitivity, scaleless skin, and unique physiology constrain how you treat them.

### Marine Ich and Cryptocaryon: Sensitivity to Copper Meds

*Cryptocaryon irritans* (marine ich) is the most common parasite outbreak in FOWLR puffer setups. The standard treatment for tangs and angels — therapeutic copper at 0.20-0.25 ppm — is dangerous for porcupine puffers. Their scaleless skin absorbs copper faster than scaled fish, and they show copper toxicity (loss of balance, refusal to eat, gasping) at doses other fish tolerate fine.

Safer treatment options for puffers:

- Hyposalinity at specific gravity 1.009 in a quarantine tank for 4-6 weeks
- Tank-transfer method (move the fish to fresh saltwater every 3 days for 12 days)
- Low-dose chelated copper (Copper Power at 1.5 ppm rather than 2.0 ppm) with twice-daily testing — this requires real attention; do not run it unmonitored
- Formalin baths for severe outbreaks, under careful supervision

Whatever you choose, treat in a separate quarantine tank, never in the display, and keep ich treatments off the display tank's calendar permanently. For step-by-step ich treatment protocols across saltwater species, the recommended workflow is the same hyposalinity-and-quarantine approach used for tangs and angels — the difference is that for puffers you must keep copper out of the protocol.

> **Marine velvet kills puffers in under 48 hours**
>
> *Amyloodinium ocellatum* (marine velvet) is far more dangerous than ich and presents as a dusty gold sheen on the body and gills, rapid breathing, and refusal to eat. It can kill an unprotected puffer in 24-48 hours. The only effective treatment is chloroquine phosphate or a carefully managed copper protocol in a hospital tank — both of which require serious commitment and pre-purchased medication on hand. Quarantine every new fish for 30 days minimum to keep velvet out of the display.

### Puffer Bloat: The Dangers of Air Inhalation During Transport

Porcupine puffers inflate by drawing water (or air) into a specialized stomach. Inflation is a defense response — when stressed, netted, or feeling threatened, the fish gulps. If it gulps water, the inflation reverses harmlessly within minutes. If it gulps air at the surface, the gas can become trapped in the stomach, leaving the fish floating uncontrollably and unable to dive.

Air-swallowing kills puffers regularly during three high-risk events: netting, transport between tanks, and acclimation in opened bags. The prevention is mechanical:

- Never net a porcupine puffer. Always move them in a sealed container submerged in tank water — a large specimen container, food-storage tub, or 5-gallon bucket scooped from the tank.
- During transport, double-bag the fish and minimize air space at the top of the bag.
- During acclimation, drip-acclimate in a fully submerged container; never let the puffer reach the air-water interface in an opened bag.
- If a puffer does swallow air, place it in a deep tank of clean water and gently invert it head-down to encourage the air to release. Some specimens recover; others do not.

This is not a theoretical risk. Air-swallowing is one of the top three causes of porcupine puffer mortality, ranking alongside lockjaw and velvet.

### Identifying and Treating Internal Parasites

Internal parasites — primarily nematodes and cestodes — are common in wild-caught porcupine puffers, which is most of them. Symptoms include weight loss despite normal feeding, stringy white feces, swollen belly that does not match condition, and listless behavior.

Treatment is a 21-day course of praziquantel (PraziPro or equivalent) and metronidazole, ideally administered through medicated food. Soak frozen shrimp or krill in the medication and feed the dosed food during a quarantine period. Most internal-parasite cases respond well to a single full course; resistant cases require a second round after a 14-day rest period.

Quarantining new puffers with a prophylactic praziquantel treatment is a strong best practice. It catches the most common internal parasites before they cause clinical disease and avoids the harder problem of treating an established display animal.

## Where to Buy & What to Look For

Most porcupine puffers in the trade are wild-caught from Indo-Pacific or Caribbean fisheries. Tank-raised *D. holocanthus* exist but are rare. Either way, the LFS health check is the critical step — a puffer that looks healthy in the bag but is not feeding will rarely recover at home.

### LFS Health Check: Ask the Store to Feed the Fish in Front of You

The single most important question to ask before buying a porcupine puffer is: "Can you feed it in front of me?"

A healthy puffer will react immediately to food entering the water — eyes tracking, fins fanning, body angling toward the source. It should accept food on the first attempt and chew visibly with its beak. Watch for:

- Strong feeding response within 30 seconds of food being offered
- Visible chewing motion (the beak should close completely on the food)
- No spitting or repeated drops — the fish should commit to swallowing
- Active foraging after the initial bite, looking for additional pieces

Red flags that should kill the sale:

- Refusal to eat at all (could be lockjaw, internal parasites, or post-shipping stress that may not resolve)
- Eats but immediately spits the food back out (suggests jaw problems or internal disease)
- Unable to fully close the beak on food (early lockjaw — the fish will not survive without expert intervention)
- Listless on the bottom, fins clamped, breathing rapid — signs of disease, stress, or pending mortality

If the LFS staff refuses to feed the fish in front of you, walk out. Any reputable saltwater dealer will accommodate this request for a fish in this price range and difficulty class. The 5 minutes it takes is the cheapest insurance you can buy on a $80-200 specimen and a 12-year commitment.

> **Build a relationship with one good saltwater LFS**
>
> Mass-market chain stores rarely have the experience to assess a porcupine puffer's health, and online drop-shippers do not let you watch the fish eat before purchase. A genuine independent saltwater LFS is the right channel for this species — not just for the initial purchase, but for the decade-plus of clams, mussels, supplements, and equipment the fish will need. Pay the local premium; you are buying expertise alongside the livestock.

### Signs of a Healthy Puffer: Clear Eyes and Active Foraging

Beyond the feeding test, look at the fish itself:

- Eyes: Clear, both moving independently, no cloudiness or pop-eye
- Skin: Even color (sandy tan to olive with brown blotches), no white patches, no abnormal swellings, no torn or missing fins
- Spines: Lying flat against the body when calm; should erect smoothly during inflation tests if the LFS demonstrates one (note: do not ask for an inflation demo unless the staff offers — repeated puffing is stressful)
- Behavior: Hovering or slowly cruising, not lying on the substrate, not pacing the glass frantically
- Belly: Slightly rounded but not distended; visible ribs or hollow belly suggests starvation or internal parasites

### Quarantining Your Puffer: A Mandatory Step

Quarantine for porcupine puffers is non-negotiable. A 30-day minimum quarantine in a separate 40-75 gallon system gives you time to:

- Confirm the fish is eating reliably on multiple foods
- Treat prophylactically for internal parasites with praziquantel
- Observe for any signs of ich, velvet, or bacterial infection before the puffer reaches the display
- Build feeding response and trust before the fish has to compete with established tank mates

Skip quarantine and you risk introducing marine velvet to an established display — a mistake that can wipe out every fish in the tank within a week. This species' price tag, lifespan, and the cost of the display make quarantine the single highest-leverage decision in puffer keeping.

## Quick-Reference Cheat Sheet

| Stat       | Value    |
| ---------- | -------- |
| Adult size | 12-15 in |
| Lifespan   | 10-15 yr |
| Min tank   | 100 gal  |

### Buyer Checklist

- [ ] Confirm species ID — true Diodon holocanthus, not D. hystrix or spiny boxfish
- [ ] Tank is 100+ gallons (125-150 strongly preferred), 6-foot footprint ideal
- [ ] Protein skimmer rated for at least 1.5x display volume
- [ ] Sump with refugium space for chemical media and macroalgae
- [ ] FOWLR setup — no ornamental shrimp, snails, or fleshy corals
- [ ] Tank mates oversized for puffer compatibility (large tangs, triggers, angels)
- [ ] Quarantine tank set up and cycled before the puffer comes home
- [ ] LFS feeds the fish in front of you with strong feeding response
- [ ] Hard-shell food sources lined up (clams, mussels, unpeeled shrimp, cuttlebone)
- [ ] Copper-free ich treatment plan ready (hyposalinity or tank-transfer method)
- [ ] Container available for transport — never net a porcupine puffer

A porcupine pufferfish is one of the most rewarding saltwater fish you can keep, but only if the keeper goes in eyes-open about the size, the diet specificity, and the decade-plus commitment. Get the tank right, lock in the hard-shell diet from day one, keep copper out of the medicine cabinet, and you will have a 14-inch water puppy that recognizes you across the room for the better part of a decade and a half.

**Find a local fish store** — [Find stores near me](https://www.fishstores.org/near-me)

## Frequently Asked Questions

### How big do porcupine pufferfish get?

In home aquaria, they typically reach 12 to 15 inches, though wild specimens can hit 18 inches. Because of their girth and messy eating habits, they require a minimum of 100 gallons, with 125-150 gallons being much better for long-term health.

### Are porcupine pufferfish reef safe?

No, they are generally not reef-safe. They will eat ornamental shrimp, crabs, snails, and may nip at fleshy corals or clam mantles. They are best suited for Fish Only With Live Rock (FOWLR) setups.

### What do porcupine pufferfish eat?

They are carnivores that require hard-shelled meaty foods to grind down their ever-growing teeth. Feed them unpeeled shrimp, clams on the half-shell, mussels, crabs, and high-quality frozen carnivore preparations.

### Can porcupine pufferfish puff up with air?

Yes, but it is dangerous. If a puffer sucks in air while at the surface or during a move, they may struggle to expel it, which can be fatal. Always move them using a container rather than a net to keep them submerged.

### Are porcupine pufferfish poisonous?

Yes, their tissues contain tetrodotoxin, a potent neurotoxin. While they are safe to keep in an aquarium, you should never handle them with bare hands, and they should never be consumed by humans or pets.

---
*Source: [FishStores.org](https://www.fishstores.org/species/porcupine-pufferfish)*
*Last updated: April 26, 2026*