Twinmold

Giant Masked Insect, Twinmold is a giant bug-like boss enemy in Majora's Mask. It is the boss of Stone Tower Temple that keeps the fourth of the Four Giants at bay.

Upon reaching the boss room, Link jumps into a hole/portal in the floor. Though the temple is switched upside-down, which would make the hole lead into the sky, he appears in a desert covered with sculptures with carvings of Majora's Mask on it. Twinmolds emerge from the ground. To defeat Twinmold, Link must put on the Giant Mask to grow up to their size and slash their heads and tails. An alternate way to defeat them is to use arrows, bombs, or the Fierce Deity Mask. After they are defeated, their bodies explode, leaving only their heads, which plummet into the ground.

Twinmold may be related to Lanmola.