Ulupi (Ulūpī), also known as Uluchi and Ulupika, is a Naga princess mentioned in the Hindu epic Mahabharata.

Ulupi is known by numerous names in the Mahabharata—Bhujagātmajā, Bhujagendrakanyakā, Bhujagottamā Kauravī, Kauravyaduhitā, Kauravyakulanandinī, Pannaganandinī, Pannagasutā, Pannagātmajā, Pannageśvarakanyā, Pannagī, and Uragātmajā.

Michael Mott in his Caverns, Cauldrons, and Concealed Creatures described Ulupi as "partly reptilian" – the portion below the waist resembles that of a snake or a crocodile.

O tiger among men, beholding you descend into the stream to perform your ablutions, I was deprived of reason by the god of desire.

Afflicted as I am by the god of desire on account of you, O you of Kuru’s race, gratify me today by giving thyself up to me.

[13] Convinced by her argument, Arjuna marries her, spending the night in the mansion of the Naga and rose with the sun in the morning.

[8] Pleased by Arjuna, Ulupi grants him a boon that every amphibious creature shall, without doubt, be capable of being vanquished by him.

[11][15] Ulupi loses her son Iravan in the Kurukshetra War, where he is slain fighting on his father's side.

[17] Upon the onset of the Kali Yuga, the Pandavas along with Draupadi retired and left the throne to their only heir Arjuna's grandson, Parikshit.

Giving up all their belongings and ties, they made their final journey of pilgrimage to the Himalayas, accompanied by a dog.