Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) investigating floating Giant Kelp (Macrocystis pyrifera) with school of juvenile fish, open ocean off San Diego, California

Flip Nicklin / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) leaping, Vancouver Island, British Columbia, Canada

Rebecca Robinson / Illustration of the diving and breaching behaviour of a Pacific White-Sided Dolphin (Lagenorhynchus obliquidens).

Yumiko Wakisaka / Striped Dolphin (Stenella coeruleoalba)

Yumiko Wakisaka / Pacific White-sided Dolphin (Lagenorhynchus obliquidens)

Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) pair surfacing, Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) pair jumping, Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens), Nine Mile Bank, San Diego, California

Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) pair, Nine Mile Bank, San Diego, California

Cheryl-Samantha Owen / Pacific white-sided dolphins (Lagenorhynchus obliquidens) porpoising, Knight Inlet, East coast, British Columbia, Canada, July.

Cheryl-Samantha Owen / Pacific white-sided dolphin (Lagenorhynchus obliquidens) porpoising, Knight Inlet, East coast, British Columbia, Canada, July.

Cheryl-Samantha Owen / Pacific white-sided dolphins (Lagenorhynchus obliquidens) porpoising, Knight Inlet, East coast, British Columbia, Canada, July.