different type of fish

Fish is a member of the paraphyletic group of organisms. This consists of gill-bearing aquatic craniates animals with limbs and digits. Most of the fishes are hagfish, cartilaginous, bony fish and lampreys. Fishes are ectothermic, which means cold-blooded. Fish are abundant in most of the bodies of water. Fishes are an important resource for humans worldwide, especially as food because it consists of a lot of minerals, vitamins, and proteins as it stays in water bodies. These are served as religious symbols.

They breathe through the gills, which serves the same function as our lungs. Bony fishes have only a single gill. Fish has a closed-loop circulatory system. They are an omnivorous group because they feed on plants and other small sea animals of water bodies. Fishes excrete nitrogenous and ammonia. Fishes reproduce highly in the open water column only. The eggs have an average diameter of one millimetre only.

fish swimming mode