* No Centralized Database: There's no global organization tracking pet ownership statistics in this level of detail.
* Variability: Pet ownership trends vary greatly across different countries, regions, and even demographics.
* Difficult to Track: Goldfish ownership is often casual and less reported than cat ownership.
However, I can offer some insights:
* Cats are very popular: Cats are consistently one of the most popular pets worldwide.
* Goldfish are common but less tracked: While many people have goldfish, they are often considered starter pets or less demanding than cats. This makes them harder to track statistically.
To get a better sense of the comparison, you might consider:
* Local Surveys: Check for pet ownership surveys conducted in your area.
* Animal Shelter Data: Some shelters may track the types of animals they receive, providing some insight.
* Online Pet Forums: Observe online communities dedicated to goldfish and cats. You might get a rough idea of their relative popularity.
Remember, any figures you find will likely be estimates and might not be representative of the entire world.