Saltwater Fish
Arothron immaculatus
Arothron immaculatus
(Immaculate Pufferfish)

Species Description…

Scientific Name: Arothron immaculatus
Common Name: Immaculate Pufferfish
Species Group: Pufferfish
Habitat: Fish Only
Care Level: Intermediate
Temperament: Semi-aggressive
Diet Type: Carnivore
Role in Aquarium: Predator
Max Fish Length: 12 (inches)
Min Aquarium Size: 100 (gallons)
Native Range: Indo-Pacific, from East Africa to Japan, Australia, and the Pacific Islands
Arothron Immaculatus - The Immaculate Pufferfish

Arothron Immaculatus (The Immaculate Pufferfish)

Overview

  • Native to the Atlantic Ocean and Indo-Pacific, commonly found in sandy coastal waters and seagrass beds.
  • Recognized by its smooth, pale yellow to tan body without distinct markings or spots.
  • A relatively peaceful species that inflates when threatened as a natural defense mechanism.
  • Often seen burrowing in the sand or hovering over the substrate in search of food.
  • A hardy and adaptable fish that requires a spacious, well-maintained aquarium.

Feeding

  • Omnivorous diet, feeding on small crustaceans, mollusks, and algae in the wild.
  • Readily accepts meaty foods such as shrimp, squid, and clams, alongside marine pellets and algae-based foods.
  • Requires hard-shelled foods like snails and crabs to prevent overgrown teeth.
  • Multiple small feedings throughout the day help maintain its energy levels and promote overall health.
  • A well-balanced diet supports a strong immune system and natural coloration.

Habitat

  • Prefers sandy and muddy bottoms, lagoons, and estuaries where it can forage and burrow.
  • Adapts well to both reef-associated environments and open coastal waters.
  • Aquariums should provide a mixture of open swimming space, sandy substrate, and hiding areas.
  • Best suited for well-established marine tanks with stable water conditions.
  • Providing varied terrain encourages natural behaviors such as burrowing and foraging.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) for maintaining healthy metabolic function.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires a high-quality filtration system to prevent ammonia and nitrate buildup.
  • Regular water changes and parameter monitoring are crucial for long-term health.
  • Providing a stress-free environment with appropriate tank mates enhances its overall well-being.

Compatibility

  • Generally peaceful but may become territorial if confined in a small space.
  • Compatible with larger, robust fish such as tangs, angelfish, and wrasses.
  • Not recommended for reef tanks, as it may nip at coral and consume invertebrates.
  • Should not be kept with small, delicate fish or slow-moving tank mates.
  • Providing enough space and a well-structured environment helps reduce aggression.

Aquarium Behavior

  • Curious and interactive, often exploring its surroundings and inspecting objects with its mouth.
  • Uses its strong beak-like teeth to crush shells and scrape algae off surfaces.
  • Capable of inflating when startled or threatened, a unique defense mechanism.
  • Providing a well-maintained habitat supports natural behaviors and minimizes stress.
  • Over time, can recognize caretakers and display engaging, personable interactions.