(7) MBU Puffer Fish

The MBU puffer (Tetraodon mbu), also known as the giant freshwater puffer, is the largest species of freshwater pufferfish. Originating from the Congo River basin in Africa, it is a highly intelligent and personable fish that requires a massive, long-term commitment from an experienced aquarist.

• Size: MBU puffers can reach impressive sizes, often growing to 24 inches or more in captivity.
• Coloration: Their bodies feature a beautiful labyrinth-like or maze pattern of dark rings over a golden or yellowish base. This pattern is unique to each individual.
• Unique traits:
  
  
  Like all puffers, they can inflate their bodies with water or air when threatened. They also have a fused beak-like mouth and continually growing teeth. 

• Tank size: A minimum of a 300-gallon tank is recommended, but many experienced keepers suggest 500 to 1,000 gallons for a fully grown adult. The tank's footprint is more important than its height.
• Water parameters: They are highly sensitive to poor water quality and require pristine, stable conditions.
  • Temperature:
    
    
    75–82°F (24–28°C).
  • pH: 7.0–8.0.
  • Filtration: A powerful filtration system and large, weekly water changes are essential to manage their high bio-load.
• Aquascaping:
  
  
  A soft, sandy substrate is necessary to protect their delicate underbelly. The tank should also have smooth rocks and driftwood, with plenty of open swimming space.
• Enrichment: MBU puffers are intelligent and can become destructive when bored. Providing environmental complexity, varied water flow, and interaction with their owner is crucial for their welfare. 

• Diet: MBU puffers are molluscivores, feeding primarily on hard-shelled prey like crabs, snails, and mussels. This is essential for naturally wearing down their teeth, which grow continuously.
• Recommended foods: Offer a varied diet of:
  • Hard-shelled snails, clams, and mussels
    
    
    .
  • Crabs, crayfish, and shrimp.
  • Earthworms.
  • Softer foods like fish fillets can be used as a supplement. 

• Temperament: MBU puffers are generally intolerant of other fish and can inflict serious injury with their powerful beaks. They are best kept in a species-only tank.
• Interaction: Despite their aggression, they can be highly interactive and intelligent, capable of recognizing their owners.
• Tank mates:
  
  
  If housing with other fish is attempted, it requires a massive tank and very careful selection of fast-swimming, robust species. Other puffers should never be housed with them.