Iridescent shark – Wikipedia

Species of pisces

The iridescent shark, iridescent shark catfish [ 4 ] ( Pangasianodon hypophthalmus ) is a species of shark wolffish ( family Pangasiidae ) native to the rivers of Southeast Asia. Despite its name, it is not a shark. It is found in the Mekong washbasin a well as the Chao Phraya River, and is heavily cultivated for food there. The kernel is frequently marketed under the common name swai. It has besides been introduced into other river basins as a food reservoir, and its hit appearance and opalescence have made it democratic with fishkeeping hobbyists, among whom it is besides known as the Siamese shark catfish or sutchi catfish. [ 5 ] The swai ‘s omnivorous diet consists of crustaceans, other pisces, and plant matter. [ 6 ]

Names [edit ]

The fish is named for the glow or opalescence exhibited in juveniles, deoxyadenosine monophosphate well as the shark -like appearance of this and other shark wolffish .

description [edit ]

Adults reach up to 130 curium ( 4.3 foot ) in length and can weigh up to a maximal of 44 kg ( 97 pound ). They have a bright, changeable color that gives these fish their name. however, bombastic adults are uniformly grey. The fins are darkness grey or black. Juveniles have a blacken stripe along the lateral line and a second black stripe below the lateral line. [ 6 ]

distribution and habitat [edit ]

P. hypophthalmus migrations in the
Orange: March to May
Dark green: May to September
Red: October to February
Shaded region: spawning region of the southern Mekong population between migrations in the Mekong River Orange : March to MayDark green : May to SeptemberRed : October to FebruaryShaded region : engender area of the southerly Mekong population between Khone Falls and Kratie Iridescent sharks originate from the large rivers Chao Phraya and Mekong in Asia, though they have been introduced into other rivers for aquaculture. They are a fresh water fish that natively live in a tropical climate and prefer water with a 6.5–7.5 ph, a body of water hardness of 2.0–29 dGH, and a temperature range of 22–26 °C ( 72–79 °F ). [ 6 ] They prefer large bodies of water similar to the deeply waters of their native Mekong river washbasin. The changeable shark is a migratory fish that in most regions moves upriver to spawn during the flood season while the waters are high and returns downstream to seek raising habitats when the river water levels recede. The dates of the migrations vary depending on the river system. In the Mekong river river basin, they migrate upriver in May to July and return downriver during September through December. South of the Khone Falls, upriver migration occurs in October to February, with its peak in November to December ; here, it appears to be triggered by receding waters at the end of the flood season. [ 6 ] In August 2015, an environmental group in Santander, Colombia, confirmed that iridescent sharks had been found in one of the tributaries that feed into the Magdalena River, having been by chance introduced from illegal farm fisheries in the area. The discovery has caused alarm amongst the scientific residential district and politics officials, as the Magdalena river is home to over 200 native fish species, 35 of which are endangered. [ 7 ]

Culinary profile [edit ]

Swai lemniscus as sold in the United States

Read more: Max (bunny)

Pangasius does not have a epicure repute and is sold cheaply as swai (, from Thai สวาย s̄wāy ) [ 8 ] [ 9 ] in the United States, panga ( or pangas ) in Europe and cream dory and basa in several asian countries and in the UK. Despite its base reputation, the entire export of pangasius from Vietnam reached US $ 1.8 billion in 2014. [ 10 ] Pangasius fillets are an increasingly popular product because of their humble cost, balmy taste and firm texture. Recipes for other whitefish such as exclusive or halibut can be adapted to pangasius. [ 11 ] Pangasius is an omnivorous fish, and thus does not require a high level of animal protein in its diet. typical grade sizes are 3–5 oz ( 85–140 deoxyguanosine monophosphate ), 5–7 oz ( 140–200 thousand ), and 7–9 oz ( 200–260 guanine ). [ 12 ]

In the aquarium [edit ]

Pangasianodon hypophthalmus A juvenile While juvenile changeable sharks are sold as pets for dwelling aquariums, they are not easy fish to keep. changeable sharks are schooling fish that prefer groups, [ 6 ] are accustomed to living in rivers, and are active fish that necessitate distance. They have identical inadequate eyesight, so detect movement from outside of their habitat can be seen as a threat. If stressed, their first instinct is to flee ; a blind hyphen can cause injury in an aquarium environment. These injuries may result in the fish sink to the bottomland, where it may lie on its side or back until it recovers. [ 13 ]

iridescent sharks require a minimal tank size of 12 megabyte ( 39 foot ) to develop naturally. Schools require even larger tanks. If given enough board and feed adequately, they can reach 1 molarity ( 3.3 foot ) in length. In most family aquarium, the miss of quad stunts their growth. For this reason, most iridescent sharks kept in home aquarium mature to 15 to 30 curium ( 6 to 12 in ) in distance only and may die prematurely. When provided adequately sized aquarium and proper farming, iridescent sharks may live into their teens and grow to fully size. [ 14 ]

See besides [edit ]

References [edit ]

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