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Oscar Fish

Profile Rating: ####o (4/5)
Based on 2 user reviews. Write a review
Oscar Fish (Astronotus ocellatus)

Photo of: Oscar Fish (Astronotus ocellatus)

Scientific Name(s): Astronotus ocellatus, Acara ocellatus, Cychla rubroocellata, Hydrogonus ocellatus, Lobotes ocellatus


Common Name(s): Oscar Fish, Common Oscar, Red Oscar, Tiger Oscar, Red Tiger Oscar, Marbled Cichlid, Velvet Oscar, Albino Oscar


Family: Cichlidae


Species Type: South American Cichlids


Maximum Size: 14 inches


Life Span: 13 years


Natural Habitat: Amazon River Basin


Minimum Tank Size: 55 gallons


Tank Region: All Over


Possible Tank Mates: Firemouth Meeki, Catfish, Plecos,


Description: Oscars are an omnivorous cichlid from South America. They are regarded as one of the most intelligent tropical fish species and are aware of the world outside of their aquarium. Oscars can recognize their owners from across a room and will often beg for food. The oscar fish grows very quickly and will reach up to 14 inches within a few years. It is not uncommon to have an oscar grow from 1 inch to 9 inches in a single year! Because of the size of these fish and their messy eating habits, a single oscar fish should have a 55 gallon tank at the bare minimum! A pair of oscars can be housed in a 75 gallon tank.


Temperature Range: 72°F - 82°F



pH Range: 6 - 8

pH 5.0
pH 6.0
pH 7.0
pH 8.0
pH 9.0


Hardness Range: 5° - 20°



Breeding Information: They reach sexual maturity at 4 inches and will form life long pairs. Keep the water temperature around 82F (28C) and provide a spot for them to place the eggs. A large rock would work well.


Sexing Information: Oscars are very difficult to sex. The only reliable ways are to wait until they spawn or through venting. Venting is very traumatic to the fish and should really never be attempted with a pet.


Diet: Flake foods, pellet foods, live foods, blood worms, earth worms, vegetables such as romaine lettuce, cucumbers and zucchini. Most experts agree that oscars should not be fed feeder fish. They are not particularly nutritous and carry a huge risk of disease transmission.


Temperament: Oscars will eat anything that fits into their mouths. Although Oscar fish are not as aggressive as some other cichlids they will fight a lot amongst each other and mating rituals can be down right viscious!


Common Diseases: Oscars are subsceptible to HITH (Hole in the Head disiease). The 2 most recognized possible causes are poor water quality and poor diet.


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####o (4/5)  Blaine - It is all true except one thing
Oscar fish can grow much larger than 14 inches I have seen some over 18 inches

####o (4/5)  Patty - Great fish
Oscars are one of my favorite South American fish due to there personalities. But they require lots of maintenance to there aquarium because they are mess fish. But other than that there a great fish.

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