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.

sperm whale physeter macrocephalus cachalote cachalot odontocete toothed cetacea cetacean warm blooded gulf of california sea cortez mexico physteridae tooth relic remain ocean oceanic sealife marine teeth mexican tropic tropics tropical central america central american northern hemisphere physeteridae skeleton skeletal artefact beach shore coast coastal