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Symphysodon (colloquially known as discus or discus fish) is a genus of cichlids native to the Amazon river basin in Brazil.Due to their distinctive shape, calm behavior, many bright colors and patterns, and dedicated parenting techniques, discus are popular as freshwater aquarium fish, and their aquaculture in several countries in Asia (notably Thailand) [1] is a major industry.
The taxonomy is disputed, but FishBase follows a review of the genus from 2006. [2] [8]In 2007 it was suggested that the correct scientific name of the blue/brown discus is S. haraldi, whereas S. aequifasciatus is the correct name for the green discus.
Symphysodon discus, the red discus or Heckel discus, is a species of cichlid endemic to the Amazon Basin of Brazil, where found in the lower Rio Negro, upper Uatumã, Nhamundá, Trombetas and Abacaxis. [2] This species is essentially restricted to blackwater habitats with a high temperature of 26–32 °C (79–90 °F) and low pH of 4.2–5.2. [3]
The green discus is found in blackwater habitats with a high temperature of 27–30 °C (81–86 °F) and low pH of 4.8–5.9. [4] Although also known from whitewater , its preference for lentic habitats such as floodplains means that the water contain little suspended material (unlike main sections of whitewater rivers).
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discus fish are capable of sex changing by itself. i have found that out by experience. i have a pair of discus and confirmed at the time he was paired up with a female and spawned a few times with young fry hatching so i know he was a fertile male discus. later on i traded it with a friend of mine who is a great discus fish hobbyist as well.
Burger King, for example, plans to debut a new Fiery Big Fish sandwich on Feb. 14, the same day that Freddy's Frozen Custard&Steakburgers plans to bring back its Deluxe Crispy Fish Sandwich.
It mainly feeds on fish, [5] but also take invertebrates such as insects and crustaceans, [3] and it is a top predator in its habitat. [6] Adults are found in relatively deep waters in main river channels, but move to shallower waters to feed at night.
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