admin Fish take food from the aquatic environment for life sustaining, body building and growth. Different species of fish feel comfortable in different aquatic environments. The foods that fish consume from different aquatic environments are varied. Fish consume a large number of living ingredients and inert substances as food. Fish eating techniques are more diverse and … Read more
The heart is a special pump device with a valve in the circulatory system. In case of fish, the heart is a folded tube that contains three or four enlarged areas. The blood brought through the veins travels from the heart to the gills through the ventral aorta and the heart always contains carbon dioxide … Read more
Different parts of the body, especially the excretory system, are involved in the removal of waste products produced by metabolism. The process of removing nitrogenous wastes from the body is called excretion. The subsidiary system of excretory function is known as excretory system. These excretory substances are formed by the accrual reaction of amino acids. … Read more
Lampreys are eel like scaleless and jawless animals which belongs to the family Petromyzontidae under order Petromyzontiformes of class Cephalaspidomorphi. They are found in coastal and freshwater habitats around the world except Africa. They can grow up to 100 cm in length with well-developed eyes. They have one or two dorsal fins with seven gill … Read more
Various ingredients are used in the preparation of supplementary food to meet the nutritional needs of fish. Foods and prepared feeds are processed to improve the nutritional value of these ingredients. The reasons why food is processed are: (1) to facilitate the movement of food; (2) can be shaped like a pellet; (3) the quality … Read more
A system known as the digestive system has been developed in vertebrates to perform the functions of food swallowing, digestion, absorption and assimilation and excretion of indigestible parts. Most of the food changes and becomes simple and soluble so that it can be easily absorbed by the blood and lymph. Such mechanical and chemical breakdown … Read more