Ginkgo biloba and other ginkgo-related supplements are taken from the ginkgo tree, a native of Asia, whose fan-shaped leaves look oddly like the teeth of whale that is named for the leaves: the Ginkgo-Toothed Beaked Whale.
The unusual teeth of the Ginkgo-toothed beaked whale are very distinctive and are one of the things about the animal that make it stand out. All 22 species of beaked whale are notoriously shy, avoiding human contact. The ginkgo-toothed beaked whale is no different, with the species being identified only from dead individuals that have washed ashore.
The few individuals that have washed ashore lacked many scare, leading some researchers to theorize that the mysterious ginkgo-toothed beaked whale may actually be an aggressive predator that attacks others before waiting to be prey. However, with no photographs or video of live individuals in the wild, the theory remains unproven.