Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus) beneath an oil rig. Eureka Rig, Los Angeles, California, USA, September

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) head on just below surface, another in background, off the West Coast of Auckland, New Zealand, February

Richard Robinson / Shortfin mako shark (Isurus oxyrinchus) profile portrait, just below surface, off the West Coast of Auckland, New Zealand, February

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus), beneath an oil rig. Eureka Rig, Los Angeles, California, United States of Ame...

Norbert Wu / Garibaldi (Hypsypops rubicundus) and Pacific Jack Mackerel (Trachurus symmetricus) school in Giant Kelp (Macrocystis pyrifera) forest, Catalina Island, California

Norbert Wu / Garibaldi (Hypsypops rubicundus) and Pacific Jack Mackerel (Trachurus symmetricus) school in Giant Kelp (Macrocystis pyrifera) forest, Catalina Island, California

Aflo / Northern sea nettle (Chrysaora Melanaster) floating, with Mackerel fry ( Carangidae) Izu, Japan. January.

Mark Carwardine / Mackerel scad (Decapterus macarellus) Guadalupe Island, Mexico (North Pacific)

Juergen Freund / Fisherman carrying a Spanish mackerel (Scomberomorus sp) caught off Komodo Island, Indonesia, August 2009.

Juergen Freund / Large catch of Mackerel scads (Decapterus macarellus) spread out to dry in the sun, Indonesia, August 2009

Juergen Freund / Large catch of Mackerel scads (Decapterus macarellus) spread out to dry in the sun, Indonesia, August 2009

Alex Mustard / Great white shark (Carcharodon carcharias) portrait, Guadalupe Island, Mexico, Pacific Ocean.