Tetraodontidae

This family includes 121 species living mostly in warm marine waters near coral reefs, sometimes brackish as well as freshwater ecosystems. They have a strong jaw with 4 teeth, which facilitates the crushing of hard shelled crustaceans. The fins are poorly developed. They reach a length of up to 90 cm. When they feel threatened, they can increase their body size. They produce a strong poison – tetradotoxin.