One of the most favored food items of sperm whales is:

Question

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Sperm whales are known to have a diet consisting mainly of squid, with the giant squid being their preferred prey. This is evidenced by the fact that the scars found on their skin and the beaks found in their stomachs are from giant squid.  The other options such as penguins, seals, and smaller cetaceans are not typically preyed upon by sperm whales, and while plankton may be consumed by certain species of whales, it is not a primary food source for the sperm whale.

One of the Most Favored Food Items of Sperm Whales