Yellow Chuchus are types of ChuChu that appear in the Zelda series. They are similar in every game except Majora's Mask.
Yellow Chuchus are simple enemies that are defeated with one sword strike and drop an arrow when defeated.
Yellow Chuchus in this game are electric and can electrocute Link. If attacked with the sword, the electricity runs through the sword and damages Link, so it must be destroyed with ranged items.