GoldfishCarassius auratus
Oscar CichlidAstronotus ocellatus
Verdict:not recommended
- Behaviour: not recommended
- Water: the shared range is very narrow
Why
The water hardly matches: the only shared point is 22 °C. The oscar is a predator up to 35 cm and eats fish noticeably smaller than itself, and a goldfish can be as small as 10 cm.
Water and size
| Parameter | Goldfish | Oscar Cichlid | Shared range |
|---|---|---|---|
| Temperature | 18 – 22 °C (64 – 72 °F) | 22 – 25 °C (72 – 77 °F) | 22 °C (72 °F) the shared range is very narrow |
| Water pH | 6 – 8 | 6 – 8 | 6 – 8 ranges overlap |
| Water dH | 5 – 19 | 5 – 19 | 5 – 19 ranges overlap |
| Size in aquarium | 10 – 30 cm (3.9 – 12 in) | 35 cm (14 in) | |
| Required aquarium volume | from 300 L (79 gal) | from 500 L (132 gal) | |
| Keeping | Schooling (usually from 5–6 individuals and more) | Pair (male/female) | |
| Temperament | Semi-peaceful (dangerous to smaller ones) | Predator, but semi-peaceful (gets along with large ones) | |
| Swimming level | middle level | middle level |
This is a general estimate: fish of the same species differ in character. Tank volume is given for each species separately — two species together need at least the larger of the two, and usually more.
Other pairs with these fish
- Siamese Fighting Fish + Goldfish not recommended
- Siamese Fighting Fish + Oscar Cichlid not recommended
- Goldfish + Angelfish not recommended
- Goldfish + Common Guppy with caution
- Goldfish + Neon Tetra not recommended
- Goldfish + Black Molly with caution
- Goldfish + Common Platy with caution
- Goldfish + Bronze Corydoras with caution
- Goldfish + Sumatran Barb not recommended
- Angelfish + Oscar Cichlid not recommended
- Common Guppy + Oscar Cichlid not recommended
- Neon Tetra + Oscar Cichlid not recommended
- Black Molly + Oscar Cichlid not recommended
- Common Platy + Oscar Cichlid not recommended
- Bronze Corydoras + Oscar Cichlid not recommended
- Sumatran Barb + Oscar Cichlid not recommended