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 freshwater fish that natively live in a tropical climate and prefer water with a 6.5 - 7.5 pH, a water hardness of 2.0 to 29.0 dGH, and a temperature range of 72 to 79 ° F (22 to 26 ° C). They prefer large bodies of water similar to the deep waters of their native Mekong river basin.
Despite its name, iridescent shark, Pangasius hypophthalmus is not a shark, but a catfish. This fish is also known as Siamese shark or sutchi catfish in the aquarium hobby or as swai or striped catfish in the food fish market, or as panga (though this name should be rather used for Pterogymnus laniarius). The species is found in Southeast Asia in the Mekong basin as well as the Chao Phraya river, and is heavily cultivated for food there. It has also been introduced into other river basins as a food source and is common in the fishkeeping hobby. It is named for its glow or iridescence exhibited in juveniles.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Iridescent shark".