How do orcas hunt?

Killer whales (orcinus orca), known as orca, are among the most intelligent marine predators. They hunt mostly in groups of more than five animals. They hunt fish, seabirds, seals, dolphins, and other whales and employ different hunting techniques. They hit their powerful tailfins in a swarm of herrings to stun them. They also use the wave-hunting technique: they create strong waves to wash seals off floating ice. They even attack gray whales after isolating an individual animal from the group.