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.
Crayfish are omnivorous, so they eat both plants and animals. They are also scavengers and will eat dead things, as long as they are relatively fresh. Some favorite foods of crayfish are worms, insects, insect larvae, and the eggs of fish, frogs, toads, and salamanders.rayfish are omnivorous, so they eat both plants and animals. They are also scavengers and will eat dead things, as long as they are relatively fresh. Some favorite foods of crayfish are worms, insects, insect larvae, and the eggs of fish, frogs, toads, and salamanders.