Why is Goku a monkey?

Why is Goku a monkey? Goku first appears in Dragon Ball as a monkey-tailed child adopted by the hermit martial artist Gohan. Before the series’ narrative begins, he accidentally and unknowingly kills Gohan when he temporarily transforms into the mighty Ōzaru after staring at a full moon.

Goku first appears in Dragon Ball as a monkey-tailed child adopted by the hermit martial artist Gohan. Before the series’ narrative begins, he accidentally and unknowingly kills Gohan when he temporarily transforms into the mighty Ōzaru after staring at a full moon.