American Cichlids
Convict Cichlid
Archocentrus nigrofasciatus

Some times called Zebra Cichlid, 2 facts are certain about these South American cichlids when it comes to breeding:
1.They are prolific breeders.
2.They become absolute terrors controlling the entire aquarium and beating the heck out of fish even twice their size.
For this reason I advise every one to have 1 male or 1 female only. They will be good tank mates for your Oscars as long as you keep only one specimen.
Remember when creating an American cichlid community it is always best to introduce them into your tank at the same time, preferable when they are babies. If you already have a couple of adult Oscars and you'd like to introduce a new adult convict, take your Oscars out of your tank, rearrange the rocks, pots, etc. then place the Convict cichlid first and wait for about one 1 hour returning your Oscars.
Convicts will eat anything but they need a diet rich in vegetables.
American Cichlids Related Articles:
Jack Dempsey. This South American Cichlid was named after legendary heavyweight: Jack Dempsey ... because Dempsey parents are as prolific as they are diligent, few aquarists have the space to rear an entire brood of fry to independence.
Silver Dollar Another compatible species for your Oscar aquarium, the silver dollar (Mylossoma pluriventre) is a peaceful, schooling fish that can be kept in groups of three to six with most other community tank species of similar size.
Bala Shark The Bala Shark - Balantiocheilus melanopterus. Is this fish a good tank mate for your Oscars? I did a search on the internet and found several people that have placed them together and claimed to have no problems.