Sperm whale

Facts

• Habitat: Prefers deep offshore water, generally staying over ocean floor at least 1,000 meters down rather than shallow coastal shelves.

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• Diet: Feeds mainly on deep-sea squid, along with sharks, skates, and fish, hunting during dives that can last up to 45 minutes.

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• Size: An adult male can reach over 15 meters long and weigh upward of 40 tons, with its head alone taking up roughly a third of its total body length.

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• Trait: Has the largest brain of any animal on Earth, weighing around 9 kilograms, though scientists are still not fully certain what its oil-filled head organ is for.

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• Social Structure: Adult females and their young form stable social units of roughly a dozen individuals, while young males instead gather into loose bachelor groups until they mature.

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• Distribution: Ranges across every ocean on Earth, from tropical waters near the equator to the edges of polar pack ice.

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