Freshwater puffer fish are a unique and fascinating species often kept in home aquariums. These fish are known for their ability to inflate their bodies with water or air as a defense mechanism against predators. There are several species of freshwater puffer fish, each with its own unique characteristics and care requirements. Most species are carnivorous and require a diet high in protein. They also need specific water conditions and should be kept in a properly-sized tank to prevent stress and aggression. Despite their small size, freshwater puffer fish are intelligent and interactive pets, making them a popular choice for experienced aquarium hobbyists.