Roberto Bubas / Killer whales {Orcinus orca} hunting sealions {Otaria flavescens} along coast of Valdez, Argentina, South America

Suzi Eszterhas / Killer whale {Orcinus orca} female with 3-6 months calf at surface, Prince William Sound, Alaska, USA

Suzi Eszterhas / Killer whale {Orcinus orca} female with 3-6 months calf at surface, Prince William Sound, Alaska, USA

Solvin Zankl / Killer whale calf spyhopping {Orcinus orca} Lofoten mtns, Norway

Todd Pusser / Transient killer whale attacking Grey whale calf. Monterey Bay, California, USA. {Orcinus

Todd Pusser / Transient killer whale leaps on Grey whale calf in attempt to drown it, California, USA.

Todd Pusser / Transient killer whale attacking Grey whale calf. Monterey Bay, California, USA.

Todd Pusser / Wounded grey whale calf rests on mother's back during attack by killer whales. California.

Todd Pusser / Grey whale calf bleeding from mouth after attack by transient killer whales. California,

Gabriel Rojo / Killer whales and calf {Orcinus orca} Valdez, Patagonia, Argentina, Punta Norte

Sue Flood / Killer whales {Orcinus orca} separate Grey whale calf {Eschrichtius robustus} from mother before attack. Monterey bay, California, USA

Sue Flood / Killer whale {Orcinus orca} attacks Grey whale calf {Eschrichtius robustus} Monterey bay, California

Sue Flood / Killer whales {Orcinus orca} attack Grey whale calf {Eschrichtius robustus} Monterey bay, California. Gray whale mother tries to protect her calf by lifting it up.

TOM WALMSLEY / Killer whale spy hopping with calf nearby {Orcinus orca} Tysfjord, Norway. winter

Roberto Bubas / Killer whales {Orcinus orca} hunting sealions {Otaria flavescens} Valdez Argentina