Adult female sperm whale (Physeter macrocephalus) at the ocean surface with her mouth open. This whale has just surfaced from foraging in deep water. There is a small piece of squid on the tip of her lower jaw. She has many visible scars left by the suckers of Architeuthis sp. giant squid, which seem to be among the primary prey hunted by sperm whales in the waters of Ogasawara (the Bonin Islands) in Japan.