A Shrimp Between Two Whales

Sunny described what was happening in a hushed voice. He didn't really need to whisper, considering that they were surrounded by a dome of silence, but it made him feel better. 

And what was happening… appeared pretty clear. 

The monstrous butterfly had been attracted by the smell of blood and arrived to feast on the corpse of the Black Turtle that the Azure Serpent had so laboriously killed. The Azure Serpent, meanwhile, was having none of it. 

In fact, judging by the madness burning in its eyes, the Great Beast was overcome with the bloody desire to rip the giant butterfly apart as well. 

'This thing… really doesn't know what's good for it, huh?'

What was the reason for the Azure Serpent's reckless insolence?