The basa is a big fish. 

The basa is a big, heavy fish. 


The basa is a big fish from Asia. 

Many people eat basa. In the United States, it is often called swai or bocourti. This is because of laws about what can be called "catfish." In the United Kingdom, people may call it river cobbler. It is a cheaper choice than fish like cod. 
Some groups worry about how basa is farmed. They worry that fish farms might cause pollution. They also worry about diseases spreading to wild fish. However, some tests on fish from stores found no bad toxins. In a taste test, many people liked basa more than US catfish. This fish is a very important food for many people around the world.
The basa is a special type of fish from Asia. 

This fish has a very distinct look. Its body is stout and quite heavy. The head is rounded and wide. It is actually broader than it is long. The snout is blunt and has a white band. 
Many different names exist for this fish. In North America, people call it swai or bocourti. In the United Kingdom, it is often called river cobbler. Some people even call it panga. In Asian markets, you might see it called patin. Sometimes, other fish are wrongly called basa. This includes the iridescent shark or the yellowtail catfish.
There was once a big disagreement called the "catfish war." In 2002, the United States had a problem with imported fish. They said Vietnamese exporters were being unfair. In 2003, the U.S. Congress passed a new law. This law said these fish could not be called "catfish." Only fish from the Ictaluridae family can use that name. Because of this, exporters now use names like basa or swai. 
Some groups have concerns about how these fish are farmed. Groups like OceanWise worry about pollution in the water. They also worry about diseases spreading to wild fish. The Monterey Bay Aquarium puts the species on a "red flag" list. However, some tests show different results. Supermarkets in the UK found no toxic contaminants in their fish. In a blind taste test, 58 people tested the fish. They liked the imported basa three times more than U.S. catfish.
Basa, scientifically known as *Pangasius bocourti*, is a species of freshwater fish. It belongs to the Pangasiidae family, which is often called the shark-catfish family. These fish are native to the Mekong and Chao Phraya river basins in Mainland Southeast Asia. 
The physical appearance of the basa is quite distinct. The fish has a stout and heavy body. Its head is rounded and is actually broader than it is long. On its blunt snout, there is a noticeable white band on the muzzle. 
Because this fish is traded globally, it has many different names depending on where you live. In North America and Australia, people often call it "swai," "basa fish," or use its scientific name, "bocourti." In the United Kingdom, legal names include "river cobbler," "cobbler," "panga," or "pangasius." In Asian markets, you might see it listed as "patin" or "Pacific dory." 
A major historical event involving this fish was known as the "catfish war" in the United States. In 2002, the U.S. government accused Vietnam of dumping fish into the American market. The U.S. argued that Vietnamese exporters were using government subsidies to create unfair competition. In response, the U.S. Congress passed a law in 2003. This law prevented these imported fish from being labeled as "catfish." Under U.S. Food and Drug Administration rules, only fish from the Ictaluridae family can be called true catfish. Now, exporters use names like basa, swai, or striped pangasius in the U.S.
Despite the labeling disputes, research has shown interesting results regarding the fish itself. During the height of the "catfish war," some U.S. farmers called the imported fish an inferior product. However, researchers at Mississippi State University conducted a blind taste test with 58 testers. The results showed that testers preferred the imported basa over U.S. catfish by a ratio of three-to-one. 
In the United Kingdom, basa is a common sight in large supermarkets. It is often sold as a cheaper alternative to white fish like cod or haddock. Because the price of basa is about half the price of cod, some retailers have faced legal trouble. In 2009 and 2010, authorities used DNA evidence to prosecute retailers who were fraudulently selling cobbler as cod. 
There are also ongoing discussions regarding the environmental impact of basa farming. Environmental groups like OceanWise have raised concerns about open-cage farming in Southeast Asia. They worry that these farms might cause pollution or transfer diseases to wild fish species. The Monterey Bay Aquarium in California currently places the species in its "red flag" category, suggesting people avoid it. They suggest that USA-farmed catfish may be a more sustainable choice. However, food safety tests by UK supermarkets like Asda and Tesco found no toxic contaminants in the fish. Some testing in Australia did find trace levels of malachite green, which is often used to treat white-spot disease in captive fish.
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