Physiology of digestion in fishes and shellfishes

Abstract

Some fish feed on plants, some on animals and a third group derives ijs protein, carbohydrate, fats, vijamins and minerals from both plant and animal sources. Some fishes live on blood and tissue fluid of other fishes (eg. Petromyzon). Some fishes feed on plankton during part of their life and some throughou1 life. Others feed on weeds. Many other feed on zooplankton and also on other larger animals like annelid worms, snail. mussel, clams, crustaceans, insect, birds, mammals, reptiles and amphibians. Even human beings are found in the stomach.