Channel catfish are themost important fish currently cultured in the United States. Both fingerlings and feeds are commercially available. Most channel catfish are raised in the southern United States in ponds one-half to ten acres in size. Cage and net pen culture are also practiced. In an existing pond, cage culture represents one way for those considering fish farming to try their hand at fish culture with a minimal cash investment. Catfish can survive a wide range of temperatures and will tolerate brackish water.