Thinking she'd end up with something more human-esc, Carrie chooses the boat. But to her horror, she finds her body to be secreting something slimy. Her body becomes awfully squishy, and her bones essentially melt into nothingness.
"NO!" Carrie screams as her hands and legs shake. Her body is like jello, which in a way is a blessing. Carrie's transformation is quick and painless. Her appendages become simple tentacles with barbed suction cups. Her breasts disappear as more and more tentacles grow from her body.
Hundred of sharp teeth grow inside Carrie's mouth, which becomes more beak-like. Her lips become hard, and push away from her face. A small black beak is left on her face, concealing the razor sharp maw behind it. Her hair falls away as her skull extends backwards. Short horns grow along the sides of her new mantle, and Carrie's size grow until the diameter is about 5 inches.
The transformation ends soon after, and Carrie props herself up on the two tentacles that used to be her legs. But Carrie is no more. Her mind only registers prey in the room, and that she needs to get to water. Her former friends are all too stunned to do anything. The Kraken disregards them, as they are primarily bones, and leaves for the ocean. She leaves a trail of slime as she goes in search of water, and a meal (preferably a whale).