Although Clostridium perfringens Type B is not considered a significant problem in the U.S.A., immunity may be provided against the beta and epsilon toxins elaborated by Cl. perfringens Type B. The immunity is derived from the combination of Type C (beta) and Type D (epsilon) fractions.
What do sea lampreys eat? A: Sea lampreys feed off the blood of large fish, including trout, salmon, whitefish, carp, catfish and sturgeon. The sea lamprey is native to the Atlantic Ocean but infiltrated the Great Lakes region in the 1920s and '30s during canal construction.
The diet of catfish often changes as they age. Young channel catfish (Ictalurus punctatus) primarily feed on aquatic insects such as dragonfly larvae, water beetles and fly larvae. By the time they're adults, channel catfish consume small fish, seeds, aquatic plants, algae, crawfish and snails.