🐠 Common Goldfish Carassius auratus

The Common Goldfish (Carassius auratus) is a easy-care, peaceful species from East Asia (domesticated). Adults reach roughly 12", so plan on a minimum tank of 40 gallons. Keep the water between 60–72°F with a pH of 6.5–8. This is a schooling fish — keep a group of at least 3 so it feels secure and colors up. As an omnivore, it does best on a varied diet appropriate to its feeding style.
At a glance
| Adult size | 12" |
|---|---|
| Minimum tank | 40 gallons |
| Temperature | 60–72°F |
| pH | 6.5–8 |
| Temperament | Peaceful |
| Schooling | Yes — group of 3+ |
| Diet | Omnivore |
| Care level | Easy |
| Origin | East Asia (domesticated) |