Chris & Monique Fallows / Dusky dolphins (Lagenorhynchus obscurus) porpoising, Puerto Madryn, Peninsula Valdez, Argentina, December.

Chris & Monique Fallows / Dusky dolphins (Lagenorhynchus obscurus) porpoising, Puerto Madryn, Peninsula Valdez, Argentina, December.

Chris & Monique Fallows / Dusky dolphins (Lagenorhynchus obscurus) porpoising, Puerto Madryn, Peninsula Valdez, Argentina, December.

Mark Carwardine / Dusky dolphin breaching {Lagenorhynchus obscurus} Kaikoura, New Zealand

Brent Stephenson / Dusky dolphin (Lagenorhynchus obscurus) somersaults from the water, Kaikoura, Canterbury, New Zealand. February.

Brent Stephenson / Dusky Dolphins (Lagenorhynchus obscurus) porpoising as they swim beside a boat. Off Kaikoura, Canterbury, New Zealand, October.

Hiroya Minakuchi / Dusky Dolphin (Lagenorhynchus obscurus) pair, Kaikoura, New Zealand

Gabriel Rojo / Dusky dolphins {Lagenorhynchus obscurus} Golfo Nuevo, Argentina

Gabriel Rojo / Dusky dolphins {Lagenorhynchus obscurus} Argentina

Gabriel Rojo / Dusky dolphin {Lagenorhynchus obscurus} Valdez peninsula, Argentina

Gabriel Rojo / Dusky dolphin leaping {Lagenorhynchus obscurus} Golfo Nuevo, Argentina

Todd Pusser / Dusky dolphin doing backflip {Lagenorhynchus obscurus}, Kaikoura, New Zealand, Pacific