Azumarill is a bipedal, blue mammalian Pokémon. It has a nearly ovoid shape with a white and white-speckled, bubble-like pattern on its underside, which helps it to camouflage itself in the water. Azumarill also has elongated, rabbit-like ears with red insides. Azumarill still possesses the wiry black tail and blue "bubble" it had in its pre-evolvedforms, except the bubble is smaller. Its eyes are circular with blue irises.
By keeping still and listening intently, it can tell what is in even wild, fast-moving rivers. Azumarill can make balloons out of air. It makes these air balloons if it spots a drowning Pokémon. The air balloons enable the Pokémon in trouble to breathe.
It lives in water virtually all day long. When it plays in water, it rolls up its elongated ears to prevent their insides from getting wet. If Azumarill spots a drowning Pokémon, it will make air balloons to help it breathe.
Azumarill live in rivers and lakes.
By focusing its hearing, Azumarill can identify what kinds of prey are around. It also eats plants.
This Pokémon was unavailable prior to Generation I.