Umbreon is a mammalian Pokémon which has a sleek, black body with four slender legs and crimson eyes. It has two pairs of pointed teeth (one pair in each jaw) which are visible when its mouth is open. It has long, pointed ears and a bushy tail, each with a yellow band around them. Its forehead and legs have yellow rings on them. Umbreon's evolution is the result of Eevee being exposed to the moonlight, which altered its genetic structure. Umbreon's yellow rings glow when it is excited, such as when it leaps to attack; or when exposed to the moon's aura, which fills it with a mysterious energy. Umbreon hunts at night and, as such, has well-developed eyes that can spot a prey even in darkness. Its black fur helps it blend into the night while waiting for the right moment to pounce. When it does, its rings emit a dim yet ominous glow, and it lunges for the prey's throat before eating.