Bakunawa

The Bakunawa is a serpent-like dragon in Philippine mythology. It is believed to be the cause of eclipses, earthquakes, rains, and wind. The movements of the Bakunawa served as a geomantic calendar system for ancient Filipinos and were part of the rituals of the babaylan priestess. It is usually depicted with a characteristic looped tail and a single horn on the nose. It was generally believed to be a sea serpent, but is also variously believed to inhabit either the sky or the underworld.

Due to increasing trade contacts with South Asia and the Indianization of Southeast Asia, the Bakunawa later became syncretized with the Nāga, Rahu, and Ketu of Hindu-Buddhist mythology.