Adult bull sperm whale (Physeter macrocephalus), preparing to dive deep near Isla San Jose, Baja California Sur, Mexico, North America

Stranded dead bull Sperm Whale (Physeter macrocephalus) lying on Roseisle Beach, North East Scotland.

An emaciated bull Sperm Whale (Physeter macrocephalus) surfacing to breathe in Loch Ainort, a sea loch on the East coast of the Isle of Skye, Scotland with the village of Luib in the background. (Restricted Resolution, please contact us).

CT with an eight-inch tooth from lower right mandible (jawbone) of an adult bull Sperm Whale (Physeter macrocephalus), Gulf of California (Sea of Cortez), Mexico

An onlooker watching a stranded dead bull Sperm Whale (Physeter macrocephalus) lying on Roseisle Beach, North East Scotland.

CT measures (9'8") the lower right mandible (jawbone) of an adult bull Sperm Whale (Physeter macrocephalus) in the mid-riff region of the Gulf of California (Sea of Cortez), Mexico. Model released.

Eight-inch tooth from lower right mandible (jawbone) of an adult bull Sperm Whale (Physeter macrocephalus) in the mid-riff region of the Gulf of California (Sea of Cortez), Mexico.

Eight-inch tooth from lower right mandible (jawbone) of an adult bull Sperm Whale (Physeter macrocephalus) in the mid-riff region of the Gulf of California (Sea of Cortez), Mexico.

Adult Sperm Whale bull (Physeter macrocephalus) surfacing (note tooth rake marks on melon) in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Sperm Whale bull (Physeter macrocephalus) surfacing in the upper Gulf of California (Sea of Cortez), Mexico.

Sperm Whale Bull, Physeter catodon, Lesser Antilles, Caribbean, Dominica