<P> In Myanmar (formally Burma), catfish is usually used in Mohinga, a traditional noodle fish soup cooked with lemon grass, ginger, garlic, pepper, banana steam, onions, and other local ingredients . </P> <P> Vietnamese catfish (Pangasius) cannot be legally marketed as catfish in the United States, and so is referred to as swai or basa Only fish of the family Ictaluridae may be marketed as catfish in the United States . In the UK, Vietnamese catfish is sold as "Vietnamese river cobbler". </P> <P> In Nigeria, catfish is often cooked in a variety of stews . It is particularly cooked in a delicacy popularly known as "Catfish Pepper Soup" which is enjoyed throughout the nation . </P> <P> While the vast majority of catfish are harmless to humans, a few species are known to present some risk . Many catfish species have "stings" (actually non-venomous in most cases) embedded behind their fins; thus precautions must be taken when handling them . </P>

How many species of catfish are there in north america