Great white sharks are documented scavengers of dead whales, and young blue whales are considered vulnerable to shark predation. Still, great whites are much more likely to scavenge from whale carcasses when one becomes available. A dead whale can provide food for sharks and many other marine animals for weeks.
Killer whales are documented predators of blue whale calves. Pods of orcas have been documented attacking whale calves, particularly if they can separate a calf from its mother.
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