Ugrasura
In the Hindu traditions, Ugrasura serpent who belongs to the asuras (non-gods) who are continually at war with the gods of that time while the Krishna was still young the Ugrasura swallowed him whole in the attempt to divert the god’s powers from becoming fully mature. While he was inside Ugrasura, Krishna put on a rapid spurt of growth, becoming fully grown. Ugrasura exploded into pieces and Krishna escaped.
John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Ugrasura, p 486
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