The blue catfish, which is native to North America, is a popular freshwater fish that is known for its large size and delicious taste. While the name "blue catfish" is commonly used to refer to this particular species, there are several other synonyms that can be used based on different factors. Some of the common synonyms for blue catfish include Channel catfish, flathead catfish, shovelhead catfish, and Mississippi catfish. Each of these terms is used in different regions and contexts to refer to the blue catfish, reflecting the diversity and richness of the English language.