Sudsakorn (Thai: สุดสาคร, RTGS: Sutsakhon, pronounced [sùt.sǎː.kʰɔ̄ːn]) is a fictional character in Sunthorn Phu's story Phra Aphai Mani, written in Thailand during the Rattanakosin period.
On a magical island called "Ko Kaeo Phitsadan" (เกาะแก้วพิสดาร), a mermaid gives birth to a child named "Sudsakorn" (สุดสาคร) which means "the edge of the sea".
The boy is reared by an old and wise hermit who eventually helps his mentee rescue his father from a yakṣī called "Nang Phisueasamut" (นางผีเสื้อสมุทร).
The boy soon begins a quest for his father, Phra Aphaimani (พระอภัยมณี), and so he begs the hermit to teach him martial arts to protect himself from the dangers along the way.
The hermit does so and also gives Sudsakorn a special gift, a flying horse-like creature called Maninmangkorn (ม้านิลมังกร, jet dragon horse), to shorten his journey.