Stock Photo - An adult bull among a pod of about 20 killer whales Orcinus orca in Antarctic Sound near the Antarctic Peninsula, Antarctica, Southern Ocean MORE INFO Killer whales are found in all oceans and most seas, including unusually for cetaceans the Mediterranean and Arabian Seas These animals are also often called killer whales, but this is a misnomer as this is actually the largest member of the dolphin family The Antarctic population of killer whales is estimated at between 70,000 and 80,000 individuals Current research suggest the possibility of several distinct species of killer whales in Antarctica