Saltwater Fish
Arothron nigropunctatus
Arothron nigropunctatus - Black-Spotted Pufferfish

Arothron nigropunctatus (Black-Spotted Pufferfish)

Species Description…

Scientific Name: Arothron nigropunctatus
Common Name: Black-Spotted Pufferfish
Species Group: Pufferfish
Habitat: Fish Only
Care Level: Intermediate
Temperament: Semi-aggressive
Diet Type: Carnivore
Role in Aquarium: Showpiece Fish
Max Fish Length: 13 (inches)
Min Aquarium Size: 100 (gallons)
Native Range: Indo-Pacific

Overview

  • Commonly found in the Indo-Pacific region, inhabiting coral reefs, lagoons, and rocky coastlines.
  • Recognized by its rounded body, yellowish-brown coloration, and scattered black spots covering its skin.
  • A slow-moving but highly intelligent species known for its ability to inflate when threatened.
  • Popular in the marine aquarium trade due to its unique appearance and engaging personality.
  • Requires a well-maintained aquarium with open swimming space and hiding areas.

Feeding

  • Omnivorous, feeding on a mix of small crustaceans, mollusks, algae, and coral polyps in the wild.
  • Accepts frozen shrimp, squid, clams, and high-quality marine pellets in captivity.
  • Hard-shelled foods such as snails and crabs are essential to prevent overgrown teeth.
  • Requires multiple small feedings per day to maintain optimal health and prevent malnutrition.
  • A well-balanced diet helps preserve their vibrant coloration and supports longevity.

Habitat

  • Typically found in coral reef environments, sheltered bays, and rocky underwater structures.
  • Prefers stable water conditions with moderate water flow to mimic its natural habitat.
  • Aquariums should include live rock structures, caves, and sandy substrate for natural foraging.
  • Thrives in well-established marine tanks that provide plenty of room for exploration.
  • Providing a structured environment with hiding spaces reduces stress and encourages natural behaviors.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) to support a strong immune system.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires high-performance filtration to handle waste production efficiently.
  • Regular water changes and monitoring are necessary to maintain stable water parameters.
  • Providing a calm, stress-free environment helps prevent disease and encourages healthy growth.

Compatibility

  • Semi-aggressive, best housed with similarly sized, robust fish that can hold their own.
  • Compatible with larger species such as tangs, angelfish, and certain wrasses.
  • Not reef-safe, as it has a tendency to nip at corals and consume small invertebrates.
  • Should not be housed with small, slow-moving fish that may become targets of aggression.
  • Providing a well-structured tank with hiding areas minimizes territorial disputes.

Aquarium Behavior

  • A naturally curious species that actively explores its surroundings.
  • Uses its powerful beak-like teeth to crush shells and scrape algae from rocks.
  • Capable of inflating when feeling threatened, a defense mechanism that should not be provoked.
  • Providing a diverse environment with caves and open spaces encourages natural foraging behaviors.
  • Over time, develops strong recognition of caretakers and becomes highly interactive.