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Many pet stores reported that most customers buying pet fish end up returning Oscar fish more often than they return other pet fish. The possible reason is that Oscar fish, if kept and grown in good conditions can exceed expectations in growth. Another reason may be the violence it develops if kept in congested places. A mature Oscar fish can reach a length of 40 cm and a weight of approximately 3 pounds. As with other fish that originate from South America and the Amazon, the Oscar fish is omnivore and needs to be fed with live food.
A particularity of the Oscar fish is the need for different food every day, a habit similar to humans. Another special feature of this type of fish is that it demands vitamin C. The lack of this vitamin can eventually kill it.
Apparently, the Oscar fish is closely related to the Piranha, assumption based on its preference for live food. It eats worms or crickets or other types of insects living around the water, but it will never refuse grasshoppers or flies.
Oscar fish kept in captivity can be fed with feeder goldfish, crayfish or rosy reds. Added to these types of food are a great variety of insects and worms. They are really happy when they get various foods each day, comprising several types of insects.
'Flake' food is the type of artificial fish food that can be easily given to Oscar fish and is also easy to find in pet shops or super markets. The recommended type is the tetra cichlid large one. A delicacy for the Oscar fish would be the frozen blood worms, none other than red mosquito larvae.
In order to keep its menu as varied as possible, Oscar fish owners should combine all the foods mentioned above. A meal should contain a both live food and artificial food.