Sperm Whale in the Pacific (IMAGE) Stanford University Caption Sperm whales like this one in New Zealand can consume up to a ton of food a day. Adult males can reach 60 feet in length and females up to 36 feet; their massive head makes up to a third of their total body length. Credit Nathalie Jaquet Usage Restrictions Photographs provided by the Stanford News Service are to be used -- with appropriate credit -- for editorial purposes only. Flopping, altering or otherwise embellishing these photos in any way that changes the photographs' editorial content is prohibited. Permission is for one-time use only. Supplied image file must be deleted after use. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.