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

Todd Pusser / Dusky dolphin group bow-riding {Lagenorhynchus obscurus}, Kaikoura, New Zealand, Pacific

Todd Pusser / Dusky dolphin playing with kelp {Lagenorhynchus obscurus}, Kaikoura, New Zealand

Flip Nicklin / Dusky Dolphin (Lagenorhynchus obscurus) jumping, New Zealand