Pacific sleeper sharks have a huge gut capacity and can fill it with copious amounts of food. Of 33 sleeper sharks sampled on an International Pacific Halibut Commission survey, five of the sharks had empty stomachs and 28 contained prey including salmon, squid, cod, pollock, squid and octopus beaks, harbor seal and other marine mammal tissue. One shark had nine adult pre-spawning chum salmon in its stomach. Sleeper sharks have been documented feeding on orca-killed whales, gorging themselves on blubber and flesh.
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