That's obviously the Wind Fish. Normal whales can't fly, don't be silly!
Well, I never thought I'd be finding a Legend of Zelda easter egg in a Kirby game, but video games are full of secrets and surprises, and never fail to surprise me! The infamous Wind Fish from The Legend of Zelda: Link's Awakening can be found in the Frozen Hillside level in Kirby Air Ride. It's not an exact match (it's missing the psychedelic colors, for example), but it looks like the Wind Fish to me, and a lot of sources agree that it is, in fact, the sleeping giant.
I usually look grumpy when people wake me up too, Wind Fish
LOOK WHO CAME: