Claudio Contreras / Balloon fish (Diodon holocanthus) with defensive spines, Puerto Morelos National Park, Caribbean Sea, Mexico, January

Georgette Douwma / Black spotted pufferfish {Arothron nigropunctatus} Andaman sea, Thailand

Richard Robinson / Blackspotted Puffer (Arothon nigropunctatus) at South Minerva Reef / Teleki Tonga, a disputed territory in the South Pacific between Tonga and Fiji.

David Fleetham / Black spotted pufferfish (Arothron nigropunctatus) resting on Gorgonian coral fan (Gorgonia), Philippines.

Alex Mustard / Star puffer (Arothron stellatus) swimming through Black coral (Antipatharia) in coral reef. Ari Atoll, Maldives. Indian Ocean.

Pete Oxford / Blackspotted puffer (Arothron nigropunctatus) amongst coral, Rainbow Reef, Fiji, South Pacific.

Georgette Douwma / Black saddled puffer / Valentin's sharpnose puffer (Canthigaster valentini) in coral reef, West Papua, Indonesia.

Pascal Kobeh / Blackspotted pufferfish (Arothron nigropunctatus) hidden in a sponge, Madagascar. Indian Ocean.

Pascal Kobeh / Blackspotted pufferfish (Arothron nigropunctatus) on a Leather coral, Mayotte. Indian Ocean.

Franco Banfi / Blackspotted pufferfish (Arothron nigropunctatus) amongst sea squirts, Maldives, Indian Ocean

Georgette Douwma / Black spotted puffer (Arothron nigropunctatus)Andaman Sea, Thailand.

Georgette Douwma / Black Spotted Pufferfish (Arothron nigropunctatus). Raja Empat, West Papua, Indonesia.