David Fleetham / Guineafowl pufferfish (Arothron meleagris) Yap, Micronesia.

Constantinos Petrinos / Spotted puffer (Arothron meleagris) juvenile defecating, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Spotted puffer (Arothron meleagris) juvenile. Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Spotted puffer (Arothron meleagris) juvenile. Lembeh Strait, North Sulawesi, Indonesia.

Pascal Kobeh / Starry pufferfish (Arothron meleagris) Maldives, Indian Ocean.

Franco Banfi / Guineafowl puffer (Arothron meleagris) Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Guineafowl puffer (Arothron meleagris) Cocos Island National Park, Costa Rica, East Pacific Ocean

Henley Spiers / Starry-bodied guinea fowl pufferfish (Arothron meleagris) swimming among a huge shoal of Jackfish (Caranx sexfasciatus) Cabo Pulmo, Baja California Sur, Mexico, Pacific Ocean.

Lucas Bustamante / Guineafowl puffer / Golden puffer (Arothron meleagris) swimming next to reef, Darwin Island, Galapagos National Park, Pacific Ocean.

Alex Mustard / Guineafowl pufferfish (Arothron meleagris) portrait, Revillagigedo Islands, Mexico, Pacific Ocean.

David Fleetham / An inflated Guineafowl pufferfish (Arothron meleagris) in front of sea fans (Gorgonia sp.) on a reef wall, Fiji, Pacific Ocean.

Georgette Douwma / RF - Tropical reef fish, composite image on black background, Radial filefish (Acreichthys radiatus), Devilfish (Inimicus didactylus), Black-spotted porcupinefish (Arothron hystrix), Puffer filefish...

Georgette Douwma / Tropical reef fish composite image on black background, Splendid soldierfish (Myripristis melanosticta), Pajama cardinalfish (Sphaeramia nematoptera), Golden puffer (Arothron meleagris), Banggai cardi...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Falcula butterflyfish (Chaetodon falcula), Yellow boxfish (Ostracion cubicus), Golden butterflyfish (Chaetodon semilarvatus), Red Sea clo...

Georgette Douwma / Yellow tropical reef fish composite image on black background, Sailfin tang (Zebrasoma veliferum) juvenile, Pajama cardinalfish (Sphaeramia nematoptera), Three-spot angelfish (Apolemichthys trimaculat...

Georgette Douwma / Golden pufferfish (Arothron meleagris) with juvenile, composite image on black background, Indo-Pacific.

Georgette Douwma / Mixed Pufferfish, adults and juveniles, composite image on black background, 1. Star puffer (Arothron stellatus); 2. Black spotted porcupinefish (Arothron hystrix); 3. Star puffer (Arothron stellatu...

Georgette Douwma / Mixed Pufferfish, adult and juvenile, composite image on black background, 1. Black spotted porcupinefish (Arothron hystrix); 2. Blackspotted puffer (Arothron nigropunctatus); 3, 4. Star puffer (Aroth...

Noemie Stroh / Diamond stingray (Dasyatis brevis) foraging on seabed, surrounded by porcupinefish and pufferfish, Cabo Pulmo National Park, Baja California, Mexico, December.

Noemie Stroh / Diamond stingray (Dasyatis brevis) foraging on seabed, surrounded by porcupinefish and pufferfish, Cabo Pulmo National Park, Baja California, Mexico, December.

Noemie Stroh / Diamond stingray (Dasyatis brevis) foraging on seabed, surrounded by porcupinefish and pufferfish, Cabo Pulmo National Park, Baja California, Mexico, December.

Tui De Roy / Guineafowl pufferfish (Arothron meleagris) swimming on reef, Wolf Island, Galapagos, South America, Pacific Ocean.

David Fleetham / Guineafowl puffer fish (Arothron meleagris) inflated, displaying defensive behaviour over coral reef, Yap, Indo Pacific, Micronesia.