Mbu Pufferfish - Tetraodon MBU
This is LARGEST of the freshwater puffers around and known as a underwater puppy due to its behavior.
Also known as the Giant Pufferfish or Giant Green Puffer. Some call it the Freshwater Puppy Puffer.
Size is around 3-4".
They can grow to 22" or more in an aquarium setting!