Fish: Limbless Cold-Blooded Fertebratic Salmon Shark

A fish is a limbless cold-blooded vertebrate animal with gills and fins and living wholly in water. Most fish reproduce by laying eggs. Some fish, such as great white sharks, give birth to live babies called pups. Some fish, such as the great white shark, can raise their body temperature. This helps them hunt for prey in cold water. The oldest known age for a fish was an Australian lungfish. In 2003, it was still alive and well at 65 years old. Fish lives in water. They have backbones, so they are vertebrates. Fish breathe using gills, that is how they absorb oxygen. Almost all fish are cold- blooded. The only two fish that are not cold-blooded is the tuna and they pacific salmon shark. Fish contains scales that protect them from being injured or infected. They have cells that help them move around in the water. Fish blend in the environment by changing their color. …show more content…
Some fish eat plant life. They may scrape algae off rocks or eat plants that grow in the ocean or sea. Some fish, called predators, prey on other fish and animals. The fish of omnivorous category feeds at the ocean’s bottom contains a mixed diet. They’re naturally opportunistic and survive on nearly any sort of food they get near the sea’s bottom. Their diet consists of small fish, crustaceans, worms, and almost anything that is not poisonous. Fish live in nearly every large body of water in the world including streams, rivers, ponds, lakes, and oceans. Some fish live on the surface of the water and some live in the very depths of the ocean. There are fish that live in fresh water and others that live in salt water. A fish does not add new scales as it grows, but the scales it has increase in size. In this way, growth rings are formed and the rings reveal the age of a