Taros

Taros are bull-like soldiers with horned heads found in the Dark World in and Lorule in. They have large white eyes and appear in blue or red varieties, each with a different weapon. Blue Taros weild spears (which appear to have blunted tips), while Red Taros carry tridents, and are usually much more aggressive. The blue ones are the most common and are found spread all over the Dark World and Lorule. Red ones are usually only found inside Ganon's Tower in their inital appearance, although one appears just north of the Village of Outcasts. However, in the sequel Red Taros are more common in Lorule than the Dark World. The red variety can also take and deal more damage. The behavior of a Taros is almost identical to that of a Soldier in the Light World, and alongside Moblins they appear to be the mainstays of Ganon's army. Despite this compared to many Dark World enemies they are quite weak, able to take and deal less damage than most, but they are much more intelligent and persistent than many of them.

In A Link Between Worlds, the color of Taros correspond the rupees that they will always drop (so if killing a red Taros will always drop a red rupee).

A Link to the Past comic
In A Link to the Past comic, a Taros is first briefly seen when Link enters the Palace of Darkness. Another Taros later appears while Link is in the Swamp Palace, where it attacks him from behind along with a Hinox. The foes then shut the entrance to the rest of the palace and impede Link from rescuing the Maiden inside. As Sahasrahla's friend watches the battle between Link and the Taros from a fountain in the Light World, the boy accidentally activates the statues that cause water to pour into the  fountain. This leads to the Swamp Palace in the Dark World to get  flooded, washing away both the Taros and the Hinox, who eventually end  up sinking as they struggle with each other.

Trivia

 * Using the Magic Mirror to warp to the Light World from an area that contains blue Taros to an area that contains green Sword Soldiers (such as south of the Haunted Grove) will cause the soldiers to turn purple in color.