Can you put an goldfish and Oscar fish together?

* Different needs: Goldfish are coldwater fish, while Oscars are tropical fish. This means they require different water temperatures.

* Aggression: Oscars are known for being aggressive fish, especially towards smaller fish. They might view a goldfish as food or prey, leading to injury or death.

* Size: Oscars grow much larger than goldfish, potentially exceeding 12 inches. They require a larger tank to accommodate their size, while goldfish prefer smaller tanks.

It's important to choose tank mates that are compatible in terms of size, temperament, and environmental needs. Mixing fish with such drastic differences can lead to stress and danger.

If you want to keep goldfish and Oscars, you will need separate tanks.