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The oscar (Astronotus ocellatus) is a species of fish from the cichlid family known under a variety of common names, including tiger oscar, velvet cichlid, and marble cichlid. [2] In tropical South America, where the species naturally resides, A. ocellatus specimens are often found for sale as a food fish in the local markets.
Oscar: Astronotus ocellatus: 45 cm (18 in) Many people that purchase these fish do not realize that the fish could grow to a foot long (30 cm) within a year. Due to their fast growth rate and large size as an adult, they are often kept in aquariums that are too small for them. [45] 72-80 °F (22-27 °C) [45] 6.0-7.5 [45] Butterfly peacock bass
Keeping and Breeding Halfbeaks - includes growth rate chart and pictures of newborn fish. Viviparous - the UK's larges online club with forums and photo albums; Loaches. International Loach Association Loach care and discussion; Loaches Online - Loaches in aquaria; Pufferfishes. Pufferpedia Archived 2009-05-23 at the Wayback Machine Pufferfish ...
Growth rate. This measures the growth of individuals in size and length. This is important in fisheries where the population is often measured in terms of biomass. Mortality. This includes harvest mortality and natural mortality. Natural mortality includes non-human predation, disease and old age.
Oscars grow at a rate approximately 1.5-3cm per month - around an inch - until they reach about about 20cm (8inch). Within the Cichlid family (the family the Oscar is in) there are hardly any varieties that match this rate of growth. Even speaking of freshwater fish in general, they are undoubtedly among the fastest growers.
Astronotus is a genus of South American fish from the family Cichlidae.There are two commonly recognized species in the genus (listed below), though genetic evidence suggests that additional species exist; several of these possibly distinct populations also have very different juvenile coloration from the two recognized species.
On "River Monsters," Jeremy Wade traveled to South America to investigate where a Bolivian man named Oscar was killed when face was ripped off while swimming across the South American River.
Aristotle (ca. 340 B.C.) may have been the first scientist to speculate on the use of hard parts of fishes to determine age, stating in Historica Animalium that “the age of a scaly fish may be told by the size and hardness of its scales.” [4] However, it was not until the development of the microscope that more detailed studies were performed on the structure of scales. [5]