Mbu Puffer Fish (Tetraodon Mbu)Tetraodon mbu is a freshwater puffer and does not require the addition of salt to its tank. This is the king of puffers. They can reach 24 inches and they have great personalities. The color is magnificent also with a back yellow maze pattern. We suggest a sandy substrate, with smooth rocks and driftwood pieces for decoration. Leave plenty of open space for swimming. You can plant the aquarium if you wish but be prepared for bite marks to appear in