Killer whales are the apex predators of the ocean, having no natural predators, while predating on almost everything else (such as beluga whales, mink whales, humpback whales, dolphins, other killer whales, seals, squid, fish, and birds).
Killer whales are at the pinnacle of the marine food hierarchy, lacking any natural predators, and they feed on almost all other oceanic species (including beluga whales, mink whales, humpback whales, dolphins, other killer whales, seals, squid, fish, and birds).