Yeah that makes sense, also some jellyfish seem to reside right next to her house. It seems a little weird to me how jellyfish appear only when you talk to her about them, and not at any other time. Like she is some sort of magical mimiga who can summon jellyfish.
Here are what the last few minutes of thinking up ideas got me:
Maybe she was a rebel and dyed her fur purple.
Maybe she was the queen of a pack of mimigas.
Maybe she was just born that way, and her parents did something with their genetics.
Maybe she is albino, if thats what albino mimiga are like.
Maybe she spilled jellyfish juice on her and never takes a shower.