| Jaguar catfish Synodontis schoutedeni |  |
| Jewel cichlid Hemichromis bimaculatus |  |
| Jewel rainbowfish Melanotaenia trifasciata |  |
| Johanni Mbuna Melanochromis johanni |  |
| Jordanella floridae American flagfish |  |
| Julidochromis marlieri |  |
| Julidochromis ornatus Golden Julie |  |
Many aquarium species are territorial; these should only be kept with other fish in a larger tank with space for each. In a well-stocked dealers tank there is no chance to set up a territory, but problems will arise once introduced into your home community aquarium