The family name Diodontidae is derived from Greek and literary means “two teeth”. All Porcupine puffer fish species have jaws with two fused teeth, which make them somewhat similar to parrots. One of the unique qualities of puffer fish is that they are capable to maneuver their eyes and more importantly independently. The porcupine fish gets its name from the sharp spines that stick out when it inflates with water. When a predator attacks the porcupine fish, it inflates its body by inhaling air or water which makes it grow larger in size, and makes its spine protrude from its body. Other fish cannot grip or bite the inflated body of the pufferfish and hence, it is protected from its enemy.
They live in circumtropical waters. Found in lagoons and reefs and are commonly seen in caves and holes in shallow reefs.
They will eat crustaceans, sea urchins and gastropods.
Spawning takes place when males gradually push females to the surface of water or connect with already-present females.
Shark and other large fish would prey on porcupine pufferfish, but their defenses ensure they are rarely a meal.