Sperm Whale shark-eating proofs as requested:"What are sperm whales doing at those cold, dark depths? Eating giant squid and octopuses. These whales sometimes bear round sucker marks on their skin from their battles with the big cephalopods. A 36-foot long squid was once found in a sperm whale's stomach. Although squid and octopuses are sperm whales' main food, an amazing variety of other things have been found in their stomachs: seals, lobsters, sponges, crabs, jellyfish, rocks, sand, glass fishing floats, coconuts, wood, apples, fishing line, shoes, and of course, the ubiquitous scourge of the ocean, plastic bags. Researchers also recovered a 10-foot blue shark from the stomach of a large male. And that's why it isn't likely sharks caused the death of the young Oahu sperm whale. Any whale that can swallow a 36-foot giant squid or a 10-foot shark isn't likely to fall prey, or let its offspring fall prey, to a shark, even a big one. "The full link for those interested:
Sperm Whales Do Eat Sharks