* The Atlantic Ocean: From the coasts of North America, down to South America, and across to Africa.
* The Indian Ocean: Along the coasts of Africa, Asia, and Australia.
* The Pacific Ocean: From the coasts of Asia and Australia, across to the Americas.
Specific habitats within these regions include:
* Coastal areas: Near reefs, rocky shores, and seagrass beds.
* Estuaries: Where freshwater mixes with saltwater.
* Open ocean: Some species are found further offshore, but most prefer shallower waters.
The specific species of porcupine fish will determine their exact habitat preferences, but generally, they enjoy warm, clear waters with plenty of food and shelter.