Oscars are very messy fish, so fish tank maintenance is paramount. A minimum fish tank size of 40 gallons (about 152 liters) is recommended if you are keeping one Oscar.īut a good size tank is 100-200 gallons to give your fish plenty of roaming space. Your Oscar aquarium should provide at least 30 gallons of space (about 114 liters) per Oscar, plus any space needed for any other fish. The oscar is one of the most popular cichlids in the aquarium hobby. ocellatuspractices brood care, although the duration of brood care in the wild remains unknown. In captivity, pairs are known to select and clean generally flattened horizontal or vertical surfaces on which to lay their 1,000 to 3,000 eggs. Like most cichlids, A. ocellatus fish are biparental substrate spawners, though detailed information regarding their reproduction in the wild is scarce. The species is limited in its distribution by its intolerance of cooler water temperatures, the lower lethal limit for the species is 12.9 ☌ ( 55.22 ☏).Īlthough the species is widely regarded as sexually monomorphic, males have been suggested to grow more quickly, and in some naturally occurring strains, males are noted to possess dark blotches on the base of their dorsal fins. The species reaches sexual maturity around one year of age, and continues to reproduce for 9–10 years.Frequency and timing of spawning may be related to the occurrence of rain. ocellatus is native to Peru, Ecuador, Colombia, Brazil, and French Guiana, and occurs in the Amazon River basin, along the Amazon, Içá, Negro, Solimões, and Ucayali River systems, and also in the Approuague and Oyapock Riverdrainages. In its natural environment, the species typically occurs in slow-moving white-water habitats, and has been observed sheltering under submerged branches. Feral populations also occur in China, northern Australia, and Florida, USA as a byproduct of the ornamental fish trade. It is believed that Tiger Oscars are the result of selective breeding of Red Oscars back to Common Oscars and "fixing" the resulting strain.Ī. (Dark base color with orange/red stripes). They include Tiger Oscars, Red Oscars, and Common Oscars The most common varities are those Oscars we normally see at most fish stores. ![]() ![]() There are no differences in care for any species, with the exception of Albino Oscars, which may require decreased lighting due to a potential sensitivity to bright lights common in albinos of any species. Oscars are all the same species (Astronotus ocellatus), however, there are several color varieties and forms available. Oscars will probably reach a maximum size at around three years old. Once they reach 12 months you should expect your Oscars size to be close to 10 inches, maybe even bigger. At about nine months, your Oscars growth rate will start slowing down. Once in your aquarium and being fed on a regular basis, you can expect an Oscar to gain nearly an inch each month for the first seven or eight months. ![]() Fish stores normally sell them anywhere between 1 and 2 inches as babies. Oscars can exceed 14 or 15 inches, however, fish like these are quite uncommon. Oscar fish normally reach a maximum size of 11 or 12 inches in captivity and can weigh up to approximately 3 lbs. Even though the Oscar can be found living wild in other parts of the world, including some of the waterways around Florida, these are fish that have been released on purpose and have started breeding. The Oscar Fish is a freshwater tropical Cichlid native to various rivers and waterways located in the Amazonian basin in South America.
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