Nosebud

Nosebud was a ship owned and created by Phineas and Ferb, created when the boys were at Lake Nose, looking for the infamous lake creature Nosey. They even named the vessel after her.

The ship consisted of a cover top, which was a normal fishing vessel, and the bottom, underwater, vast submarine stretching a few miles connected to it. The Nosebud as well contained a search vessel, the Mark Schnozolo.

Nosebud's lower submarine was destroyed due to interference by Heinz Doofenshmirtz, though the top boat remained untouched.