Pack Ice Type B killer whales (Orcinus orca), finding a leopard seal (Hydrurga leptonyx), on an ice floe in Antarctica, Polar Regions

orcinus orca leopard seal hydrurga leptonyx ice floe antarctica polar regions marine life wildlife hunting behavior orcas seals antarctic ecosystem icebergs ocean cold climate natural habitat aquatic mammals conservation biodiversity seal behavior group dynamics cetaceans southern ocean marine conservation polar environment foraging icy waters adaptation temperature extremes wildlife observation oceanographic studies environmental research cold environment icy terrains natural phenomena ecological balance species interaction survival strategies apex predators marine ecosystems underwater hunting pack behavior social structure conservation efforts climate impact marine biology ecological diversity polar expeditions atlantic ocean