The answer is letter B or four. A puffer fish has four teeth which are fused in their beak-like structure. They use their teeth for different things such as for opening clams, shellfish and mussels. They also use their four teeth to crush and grind their preys before they consume them. A puffer fish is also known as globefish, swellfish and blowfish.
It is also best known for its defense – they puff up two times of their original size and releases tetrodotoxin which produces an unpleasant smell for their predator. It is also unhealthy for humans to eat a puffer fish because the tetrodotoxin would poison them. They are carnivores, which means that they eat corals, sea urchins and sponges.