Mogma

Mogmas are a race from The Legend of Zelda: Skyward Sword. They are a subterranean race that reside in the Eldin Volcano region of The Surface. Physically resembling a combination of a mole and a prairie dog, Mogma are able to quickly burrow and resurface from underground. Mogmas are, by nature, compulsive treasure hunters; however, this character flaw is overshadowed by Mogmas' charitable nature towards those in need. All known Mogma have a name based on a real world metal or mineral. It is also belived that Gorons came from this race.
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Story
While attempting to get into the Earth Temple to uncover its treasure, Ledd and Cobal reveal to Link that the key to the temple was broken into several pieces and scattered throughout the volcanic region. Using the Goddess Sword's dowsing ability to find the pieces, Link is able to reassemble the key and enter the temple. Inside the temple, Link meets Ledd and Cobal once more, receiving the Bomb Bag from the former during his exploration of the temple.

Etymology
The name "Mogma" may originate from the Japanese word "mogura", which means "mole" in English. Another explanation might be the name's phonetic similarity to "magma", which is abundant throughout the Eldin Volcano.