Diodon circumspectus fish jaw collected from Miocene sediments in Florida, USA. Diodon is the genus which porcupinefishes or balloonfishes belong to. These fish have the ability to inflate themselves and once inflated, spines on their skin stand erect making them much more daunting to potential predators. They have beak like jaws which they use to crush the hard shells of their prey items which would typically be crustaceans and mollusks. These jaws vary in size but typically measure between 2 - 3 cm in length and are supplied in small plastic bags with an information label.