Mooranha is a species of Fish from The Legend of Zelda: Majora's Mask 3D. Spoiler warning: Plot or ending details follow. It is a brutal species of piranha native to Termina and is known as the Swampland Cow Killer as it cannot resist the sight of a Cow, as it drives them into a feeding frenzy. It can be caught in the Swamp Fishing Hole while wearing Romani's Mask. Spoiler warning: Spoilers end here.