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.

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

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

Pascal Kobeh / Yellowtail surgeonfish (Prionurus punctatus) grazing algae with a school of jack mackerels (Trachurus symmetricus) Baja California peninsula, Mexico. Sea of Cortez.

Norbert Wu / Pacific Jack Mackerel (Trachurus symmetricus) school, Guadalupe Island, Mexico

Norbert Wu / Pacific Jack Mackerel (Trachurus symmetricus) school, Guadalupe Island, Mexico

Nature Production / Japanese Jack Mackerel {Trachurus japonicus} Izu, Shizuoka, Japan

Stephane Granzotto / Mackerel scad (Decapterus macarellus) baitball swimming beneath diver. The typical ball formation is due to the presence of predators. La Ventana, Sea of Cortez, Mexico. May.

Stephane Granzotto / Mackerel scad (Decapterus macarellus) shoal swimming around the diver. The fish are seeking protection from the diver, due to the presence of predators. The fish leave the frame. La Ventana, Sea of Co...

Stephane Granzotto / Pacific bonito (Sarda chiliensis lineolata) shoal hunting Mackerel scad (Decapterus macarellus) baitball from below. The baitball is at the surface of the water. La Ventana, Sea of Cortez, Mexico. May...