Their assigning of scientific names to species differed to some extent from that used by earlier authors: Heckel (S. discus; Rio Negro, upper Uatumã, Nhamundá, Trombetas and Abacaxis), green (S. tarzoo; West Amazon drainages upriver from the Purus arch), blue (S. sp. Will Oscar Fish Eat Goldfish? They can live for 10 years or more.  Unlike more predatory cichlids, Symphysodon have relatively long intestines typical of a herbivore or omnivore. , In addition to the wild discus, several captive variants achieved by selective breeding exist. Discus fish, kept in good conditions, can live for up to 15 years and reach sizes of up to 20 centimetres / 8” in diameter! Whether S. haraldi is indeed distinct from S. aequifasciatus remains to be determined; if valid it is widespread but it might just be a color morph.  Discus typically reach up to 12.3–15.2 cm (4.8–6.0 in) in length, but captives have been claimed to reach 23 cm (9 in).  S. tarzoo was described in 1959 and applies to the red-spotted western population. At about 2.5 years of age, these fish will reach their full size. Sometimes, fish are just not meant to grow large. , Discus are kept by fishkeepers in the home aquarium. They are considered difficult to keep, and require regular large water changes, a school of other discus, and slightly acidic water. S. aequifasciatus occurs in the East Amazon downriver from the Purus arch and S. tarzoo in the West Amazon upriver from the Purus arch. And this is also quite typical for Oscar fish, too.  The Xingu group currently lacks a scientific name, but it is possible that the correct name for the blue is S. Another thing you simply must do at all costs is to ensure the water is clean at all times. But if you don’t give them the right conditions to grow, their growth will be stunted. , Discus fish - Page 5 Thomas A. Giovanetti, Matthew M. Vriends - 1991 "It was not until the 1930s and 1940s that aquarium-fish dealers began importing discus into Europe and the United States under the common name "pompadour fish." , The Nanay River in far western Amazonas is outside the native range; discus in this river were introduced from stock originating in the Tefé area by an aquarium exporter more than 30 years ago. Based on RAPD sequences, the captive variants popularly known as turquoise, pigeon, ghost, cobalt and solid red are derived from wild green, blue and brown discus (not Heckel discus). Discus are fish from the genus Symphysodon, which currently includes the species S. aequifasciatus, S. discus and S. tarzoo, based on a taxonomic review published in 2006. Keep the diet balanced, and varied. Some fish keepers, according to Wikipedia, have reported their fish have grown to up to 9 inches in height (23cm). Discus are fish from the genus Symphysodon, which currently includes the species S. aequifasciatus, S. discus and S. tarzoo, based on a taxonomic review published in 2006. Discus fish can reach about 5-6.5 inches in length (13-17cm) and 6-8 inches in height (17-20cm), so they are quite a tall and large fish.This forces you to get a relatively large tank for them (around 50 gallons per fish), which is quite a lot of space. Here’s what you can do to speed up their growth quickly. Froese, Rainer and Pauly, Daniel, eds. So why do discus fish stop growing? Other species and subspecies have been proposed, but morphometric data (unlike in Pterophyllum, the freshwater angelfish) varies as much between individuals from one location as across the whole range of all discus fish species. If they become too big for the aquarium, they won’t be able to survive normally. Body can grow to be 20-25 cm (8-10 in) long depending on its kind. Due to their size and requirements for tankmates, they often require a minimum 55–75 gallon aquarium, which means that setting up a discus aquarium requires attention to the ability of the floor to support weight. Also, genetics play a big role in determining how much the fish will grow.  This taxonomy with four described valid species, S. discus, S. tarzoo, S. haraldi and S. aequifasciatus, has been adopted by the Catalog of Fishes. Discus Fish Care. They like meaty foods, such as bloodworms and other similar types of food. Discus are cichlids, which often surprises many aquarists. In contrast to Pterophyllum, however, extended finnage is absent giving Symphysodon a more rounded shape. In home aquariums, discus live for an average of 10 years, but can live up to 15 years, and can grow up to 8 inches. If the discus fish are limited by the aquarium, their growth will stop. , Like cichlids from the genus Pterophyllum (angelfish), all Symphysodon species have a laterally compressed body shape. When they are young, they tend to be a bit …, Your email address will not be published. This is one of the cichlids which has the most flattened body and it reminds a disc, which gave the fish its name. First, let me preface this question with the statement that I know there are alot of variables here, but assuming healthy fish, regular water changes and a good diet, what size should discus be at 1 month of age?, 3 months, 6 months, 9 months etc.. At what age would they likely be ready to … Just like human beings can’t live in areas that are too warm or too cold, the same goes for discus fish (and all other fish species, for that matter).  A review published in 2007 largely came to the same result, but differed in nomenclature, as the species called S. tarzoo in the 2006 study was called S. aequifasciatus in the 2007 study, and S. aequifasciatus in 2006 was S. haraldi in 2007. One Discus fish per 7 gallons is ideal. It’s very important that you feed the fish nutritious foods that will have enough nutrients that will allow them to grow. This is done by a good filter, but you also need to change the water at times. Just follow the rules and make sure everything else is in check – you can’t do much more than that! They are fully grown at the age of approximately 2 to 2.5 years!  Additionally, adult discus produce a secretion through their skin, which the larvae live off during their first four weeks. The sides of the fish are frequently patterned in shades of green, red, brown, and blue. Just like other animals, fish are genetically conditioned to grow up to a certain size, and they won’t be able to grow over that size, no matter what you do. Due to their distinctive shape, behavior, and bright colors and patterns, discus are popular as freshwater aquarium fish, and their aquaculture in several countries in Asia is a major industry. What is the best size of the aquarium for discus? , In the present day, a significant number of discus live in fish farms in southeast Asia. Keeping good parameters is also key. As we’ve discussed, they can reach up to 8 inches in height. , Each year the World Discus Competition takes place in Guangzhou, China. Symphysodon, colloquially known as discus, is a genus of cichlids native to the Amazon river basin in South America. As these fish need to be in schools of at least 5, a 50 gallon tank is the smallest tank they will thrive in. You need to make sure you give them everything needed up to that point so they can grow as much as possible. Up until that age, you’ll need to make sure they get everything they need to reach that size. That’s quite a large fish, isn’t it? So you must do everything needed to ensure they grow as much as possible and reach their potential. Consider how many fish you intend to keep, and make sure you buy a large enough tank for the fish (50 gallons is enough for one discus fish).