Can a dragonfish live with fancy goldfish?

No, a dragonfish and fancy goldfish should not be housed together. Here's why:

* Different needs: Dragonfish are predatory fish that require a cool, oxygen-rich environment. Fancy goldfish, on the other hand, prefer warmer water and are more tolerant of lower oxygen levels.

* Feeding habits: Dragonfish are carnivores and will readily consume smaller fish. Fancy goldfish are herbivores or omnivores, meaning they would be easy prey for a dragonfish.

* Aggression: While dragonfish are not necessarily aggressive, they are predatory and may see fancy goldfish as food. This could lead to injury or even death for the goldfish.

In summary, keeping a dragonfish and fancy goldfish together is a recipe for disaster. They have fundamentally different needs and temperaments that make cohabitation impossible.