Black MollyPoecilia sphenops
Oscar CichlidAstronotus ocellatus
Verdict:not recommended
- Behaviour: not recommended
- Water: ranges overlap
Why
The oscar is a predator up to 35 cm and eats fish noticeably smaller than itself. A molly is 8–12 cm, noticeably smaller, so keeping them together is not recommended.
Water and size
| Parameter | Black Molly | Oscar Cichlid | Shared range |
|---|---|---|---|
| Temperature | 21 – 26 °C (70 – 79 °F) | 22 – 25 °C (72 – 77 °F) | 22 – 25 °C (72 – 77 °F) ranges overlap |
| Water pH | 7 – 8.5 | 6 – 8 | 7 – 8 ranges overlap |
| Water dH | 15 – 30 | 5 – 19 | 15 – 19 ranges overlap |
| Size in aquarium | 8 – 12 cm (3.1 – 4.7 in) | 35 cm (14 in) | |
| Required aquarium volume | from 150 L (40 gal) | from 500 L (132 gal) | |
| Keeping | Mixed (solitary / pair / group) | Pair (male/female) | |
| Temperament | Peaceful (regular) | Predator, but semi-peaceful (gets along with large ones) | |
| Swimming level | near the surface | 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 + Black Molly not recommended
- Siamese Fighting Fish + Oscar Cichlid not recommended
- Goldfish + Black Molly with caution
- Goldfish + Oscar Cichlid not recommended
- Angelfish + Black Molly not recommended
- Angelfish + Oscar Cichlid not recommended
- Common Guppy + Black Molly compatible
- Common Guppy + Oscar Cichlid not recommended
- Neon Tetra + Black Molly not recommended
- Neon Tetra + Oscar Cichlid not recommended
- Black Molly + Common Platy compatible
- Black Molly + Bronze Corydoras compatible
- Black Molly + Sumatran Barb with caution
- Common Platy + Oscar Cichlid not recommended
- Bronze Corydoras + Oscar Cichlid not recommended
- Sumatran Barb + Oscar Cichlid not recommended