Gold Skulltula

These are large gold spiders which can be found in the games mentioned above.

In Majora's Mask, there are two skulltula houses in which they can be destroyed for a treasure.

In Ocarina of Time, when these creatures are destroyed they leave tokens. When Link destroys certain numbers of these creatures, he is given rewards by a cursed family found in Kakariko village. Gold Skulltalas like soft soil and munching on small bugs. They can be found at night or in small, dark places-and can be heard by their distinctive scraping sound.

Glitch
In OoT, at Hyrule Castle, near where the drain entrance is to the inner courtyard, there is a secret hole near a tree, opened with the Song of Storms. In this hole a Golden Skulltulla could be found. By killing it, boomeranging the resulting token and stepping into the light as soon as the boomerang approaches you (NOT as soon as you grab it), a glitch would occur where the skulltulla would not register as destroyed, and respawn every time this was done, as long as it was done correctly. By this, many more than 100 Skulltulla tokens were achievable. This is only confirmed to work on the N64 version; it remains untested on the Gamecube version.