Goldie is the name for Phineas and Ferb's new goldfish pet. She was so special to them that they decided to build her an aquarium and get her friends from the ocean. She also participated in the show and apparently went into the ocean with her fish and oceanic mammal friends. She was still kept in the water bag. ("Backyard Aquarium")
- Goldie is the second goldfish to appear in the show. (Biff was the first.)
- She is the fourth known pet of Phineas and Ferb after, Perry, and Phineas and Ferb's unnamed fish. Details of how Phineas obtained Goldie aren't known.
- Backyard Aquarium (First appearance)