The White Boe is an enemy type encountered in Majora's Mask. They are always clumped together in groups, as that is the only real way they can harm Link. They come in two varieties; the Black Boe chooses to immerse itself in dark areas whereas the White Boe hoists itself within the lightest conditions, such as snow.
It's a White Boe...
White Boes are also masters of camouflage blending in with nearby snow. Like their darker brethren, White Boes attack in swarms. A simple slash of the sword dispatches them. They are the most common enemy in the Snowhead Temple.