Porcupine Puffer

Looks how to spot one

Scales and spines

The body is covered in long, two-rooted depressible spines, especially on the head. It has a parrot-like fused beak made of teeth. The skin is leathery and lacks scales.25

Personality what they are like

Semi-aggressive. It is a solitary, nocturnal predator that can be peaceful with fish too large to eat, but will nip fins and swallow any small tank mates. It develops a strong bond with its keeper and begs for food.35

Daily activity how busy a day looks

Needs a large aquarium with open swimming space and hiding places. It is a slow swimmer that uses pectoral fins to move. Not suitable for reef tanks as it destroys corals and invertebrates.35

Grooming and care the hands-on bits

Requires a massive marine aquarium (minimum 1000 litres / 250 gallons) with oversized mechanical and protein skimmer filtration. It is a messy eater with a huge biological load, so large water changes and anti-phosphate resins are often needed. Must never be provoked into inflating as it can trap air and die.35

Home where they are happiest

Marine aquarium with stable salinity 1.020-1.025, pH 8.1-8.4, temperature 72-78°F (22-26°C). Needs a fish-only setup with robust tank mates. Not reef safe. Parts of its flesh are poisonous if digested, so care should be taken.53

Food basics what goes in the bowl

Durophagous carnivore. Must eat hard-shelled prey such as whole shrimp with carapace, crabs, clams, mussels, and snails to wear down its continuously growing beak. Soft foods alone cause beak overgrowth and death. Also accepts squid, octopus, and large krill as supplements.35

Company who they like around

Solitary and nocturnal. In captivity it bonds strongly with its keeper. Should be kept with large, robust fish only; will eat any fish small enough to fit in its mouth. Not suitable for community tanks with small species.3

The story where it all began

The porcupine puffer has been kept in home aquariums for decades, valued for its intelligence and interactive personality. It is a popular 'wet pet' among experienced marine aquarists. Its natural defence of inflating and erecting spines has made it a well-known species in the aquarium trade, though it requires dedicated care due to its size, diet, and waste production.35

Recognised by the official bits

FishBase

Max length 50.0 cm TL, common length 15.0 cm TL1

Florida Museum

Adults can reach up to 36 inches (91 cm), making them the largest spiny puffer species4