Claudio Contreras / Long-spine porcupinefish (Diodon holocanthus), Xkalac Reefs National Park, Caribbean region, Mexico, May

Franco Banfi / Diamond stingray (Dasyatis brevis) with Longspined porcupinefish (Diodon holocanthus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Jurgen Freund / Long-spine Porcupinefish (Diodon holocanthus) in its discarded aluminum can home, North Sulawesi, Indonesia. November.

Jurgen Freund / Long-spine Porcupinefish (Diodon holocanthus) in its discarded aluminum can home, North Sulawesi, Indonesia. November.

David Fleetham / Longspined / Freckled porcupinefish (Diodon holocanthus), two. Philippines.

Claudio Contreras / Ghost Crab (Ocypode sp.) eating Balloonfish (Diodon holocanthus) carcass, Playa Morro Ayuta, Oaxaca state, southern Mexico, August

Claudio Contreras / Balloonfish (Diodon holocanthus), San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Claudio Contreras / Balloonfish (Diodon holocanthus), San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Franco Banfi / Long-spine porcupinefish (Diodon holocanthus) Salvatierra wreck dive site, Sea of Cortez, Baja California, Mexico, East Pacific Ocean

Tony Wu / Porcupine pufferfish (Diodon holocanthus) three males pursuing a female, Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Long-spine porcupinefish (Diodon holocanthus) male pursuing a female fish, Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Long-spine porcupinefish (Diodon holocanthus) male pursuing a female fish to mate, Lembeh Strait, North Sulawesi, Indonesia

Georgette Douwma / Freckled / Spiny porcupinefish (Diodon holocanthus) Lembeh, Sulawesi, Indonesia.

Pascal Kobeh / Porcupinefish (Diodon holocanthus) close up skin detail, Sulu Sea, Philippines

Georgette Douwma / Freckled or Spiny porcupinefish (Diodon holocanthus) with Funnel weed (Padina gymnospora) Lembeh, Sulawesi, Indonesia.

Pascal Kobeh / Close-up of Shortspine porcupinefish (Diodon holocanthus), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Longspined porcupinefish / balloonfish (Diodon holocanthus) Baja California peninsula, Mexico. Sea of Cortez.

Pascal Kobeh / Longspined porcupinefish / balloonfish (Diodon holocanthus) on reef, San Salvador Island / Colombus Island, Bahamas. Caribbean.

Jeff Rotman / Short spined porcupine fish (Diodon holacanthus) in Lembeh Strait, Celebes Sea, Sulawesi, Indonesia.

Claudio Contreras / Balloonfish (Diodon holocanthus), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July