Species Description…

Scientific Name: Arothron diadematus

Common Name: Masked Pufferfish

Species Group: Pufferfish

Habitat: Reef Safe with Caution

Care Level: Intermediate

Temperament: Semi-aggressive

Diet Type: Omnivore

Role in Aquarium: Showpiece Fish

Max Fish Length: 12 (inches)

Min Aquarium Size: 125 (gallons)

Native Range: Red Sea, Western Indian Ocean

Arothron Diadematus - The Masked Pufferfish

Arothron Diadematus (The Masked Pufferfish)

Native to the Red Sea and the western Indian Ocean, commonly found in coral reefs and seagrass beds.
Easily identified by its pale grayish-white body with distinctive black markings around the eyes and mouth.
A slow-moving but inquisitive species known for its ability to inflate when threatened.
Highly popular among marine aquarists due to its unique appearance and engaging personality.
Requires a well-maintained tank with ample space to swim and explore.

Omnivorous, feeding on a variety of small crustaceans, mollusks, and algae in the wild.
Readily accepts meaty foods such as shrimp, squid, and clams, along with high-quality pellets.
Providing a diet that includes hard-shelled foods is essential for maintaining strong and healthy teeth.
Requires multiple feedings per day to meet its nutritional needs.
Offering a diverse diet helps prevent deficiencies and supports long-term health.

Typically found in coral reef systems, sandy bottoms, and seagrass meadows.
Prefers stable water conditions with moderate water movement.
Aquariums should include a mix of open swimming space and hiding areas created with live rock.
Does best in a well-established marine tank with minimal tankmates that may provoke stress.
Providing an enriching environment helps keep them active and engaged.

Optimal water temperature: 74-80°F (23-27°C) for maintaining activity and a healthy immune system.
pH range: 8.1-8.4, with a salinity level of 1.020-1.025 to support proper osmoregulation.
Requires high water quality with efficient filtration to prevent stress-related illnesses.
Regular water changes are essential to keep ammonia and nitrate levels under control.
Providing a clean and stable environment enhances coloration and overall well-being.

Semi-aggressive; should be housed with similarly sized fish to avoid bullying or fin nipping.
Compatible with large angelfish, tangs, and other robust species when given enough space.
Should not be housed with small, delicate fish or slow-moving invertebrates.
Not reef-safe, as it may nip at coral and consume crustaceans.
Providing plenty of swimming room and hiding spots helps reduce aggressive tendencies.

Generally slow-moving but can become highly interactive with familiar surroundings and caretakers.
Uses its strong beak-like teeth to crush shellfish and scrape algae off surfaces.
May inflate as a defense mechanism if startled or threatened.
Providing a spacious, well-structured environment helps support its natural behaviors.
Becomes more confident over time and can recognize caretakers, making it a personable addition to marine tanks.