The long-spine porcupinefish (Diodon holocanthus), also known as the freckled porcupinefish and balloonfish among other vernacular names, is a species of marine fish in the family Diodontidae.
The long-spined porcupinefish has a circumtropical in distribution, being found in the tropical zones of major seas and oceans: in the Atlantic it is found from Florida and the Bahamas to Brazil and in the Eastern Atlantic from 30°N to 23°S, as well as around South Africa and in the western Indian Ocean from the southern Red Sea to Madagascar, Réunion and Mauritius, also in the Pacific Ocean from southern Japan to Lord Howe Island, and east to the Hawaiian and Easter islands, also from southern California to Colombia and the Galápagos Islands.
Its diet includes sea urchins and hard-shelled mollusks.