Kodongo

Kodondos are small reptillians that appear in A Link to the Past with an appearance similar to a rhino or triceratops, much like a Dodongo. They often appear behind low barriers, where they walk back and forth occasionally breathing bursts of three fireballs. These fireballs can reach beyond the barrier, but it is difficult for Link to hit the Kodondo. The fireballs will burst into flame when they impact on something, so they can temporarily block off short passageways with their flames. The Kodondos themselves are weak, and can be defeated with a single sword stroke, although they are invulnerable to other attacks like the Boomerang. Green Kodondos appear in the Palace of Darkness in the Dark World, where they live in a pitch black maze-like room, making their attacks more dangerous, but they themselves are no stronger than the red variety.

Trivia

 * Dodongos and Kodondos are probably related, but prior to A Link to the Past, Dodongos did not breath fire. In games afterwards, such as Ocarina of Time, Dodongos gained the ability to breath fire much like a Kodondo.
 * Despite being similar to a Dodongo, Kodondos are completely immune to Bombs.
 * Kodondos first appear in the Tower of Hera, while a similar tower in Four Swords Adventures, the Tower of Flames, is home to fire-breathing Dodongos.