Bubbie is a large female anthropomorphic whale, she is Flapjack's devoted, adoptive single mother. Bubbie serves as the primary home and transport of both Flapjack and K'nuckles.
She is voiced by Roz Ryan who also voices Cookie from Pound Puppies (2012 Series) and one of the muses from Disney's Hercules.
She is a sky blue whale who lives in Stormalong Harbor.
She is an over-protective mother to him. She usually attempts to keep him away from the dangers outside of Stormalong but does so with very little success.
She frequently disapproves of Flapjack's desire for adventure, but will always be won over.
She raised Flapjack as her own. As told in "Oh Brother", she found Flapjack at sea in a bed of seaweed. Bubbie and K'nuckles frequently disapprove of each other's actions, especially concerning 'adventure'. She believes K'nuckles to be irresponsible, lazy, and a bad influence on Flapjack. However, Bubbie is classified as a hypocrite by K'nuckles because of how she has a consistency of being irresponsible and rule-breaking herself. It is revealed in "100 Per Census" that Bubbie's last name is the same as her first name. Flapjack and K'nuckles live in her mouth.