In his exile, Arjuna came to a lake infested with deadly crocodiles. Unafraid, he jumped into the water. A crocodile seized him, but Arjuna wrestled with the crocodile and finally dragged it ashore.
Then, to Arjuna's surprise, the crocodile turned into a beautiful apsara!
She urged Arjuna to wrestle with the other crocodiles in the lake; they all turned into apsaras.
"A rishi cursed us to become crocodiles," they said, "but we knew a kshatriya would free us."
The apsaras returned to heaven, and the people of the land were able to safely bathe in the waters of the lake.
Inspired by: Jaya: An Illustrated Retelling of the Mahabharataby Devdutt Pattanaik.
Notes: This story is on p. 116. This is part of the Arjuna-vanavasa Parva.