It lives in water virtually all day long. Its body color and pattern act as camouflage that makes it tough for enemies to spot in water.
By keeping still and listening in tently, it can tell what is in even wild, fast- moving rivers.
When it plays in water, it rolls up its elongated ears to prevent their insides from get ting wet.
The bubble-like pattern on its stomach helps it camouflage itself when it's in the water.
AZUMARILL’s long ears are indispensable sensors. By focusing its hearing, this POKéMON can identify what kinds of prey are around, even in rough and fast-running rivers.
— Pokédex entries (via PokeAPI)