fish
ish, any of around 34,000 types of vertebrate creatures (phylum Chordata) found in the new and salt waters of the world. Living species range from the crude jawless lampreys and hagfishes through the cartilaginous sharks, skates, and beams to the bountiful and different hard fishes. Most fish species are wanton; nonetheless, one animal varieties, the opah (Lampris guttatus), is warm-blooded. The term fish is applied to an assortment of vertebrates of a few transformative lines. It depicts a day to day existence structure rather than a scientific categorization. As individuals from the phylum Chordata, fish share specific highlights with different vertebrates. These elements are gill cuts eventually in the existence cycle, a notochord, or skeletal supporting pole, a dorsal empty nerve rope, and a tail. Living fishes address about five classes, which are as particular from each other similar to the four classes of natural air-breathing creatures of land and water, reptiles, birds, and w