Fish anatomy consist of various external and internal structures of the fish that allow the fish to perform its functions in its aquatic environment. There are various different parts to a fish, and each part of a fish have a specific purpose in the survival of that species. Most fish has a physical shape that is streamlined to allow them to easily move through water.
Many fish have bilateral symmetry so that the left side of their bodies is the same as the right side of their bodies. Fish has external organs refered to as fins that help them to move through water and maintain their balance. The dorsal fin is located on the top of the fish, and it prevent the fish from rolling.
Fish Parts and What They Do
The anal fin is located on the underside of the fish and provide its balance. The tail fin, also known as a caudal fin, allows the fish to propel itself forward through the water. Some fish has a forked caudal fin so that they can swim at high speeds.
Other fish have rounded caudal fins used for slow movement through water. Pectoral fins are located on the sides of the fish and act as rudders for the fish to steer. Pelvic fins are located on the bottom of the fish and allows for control of its movement through water.
Some fish species also have an adipose fin that is located near the tail of the fish. The lateral line is a sensory organ of the fish that help to detect vibrations in the water. The lateral line helps the fish to detect the movement of its prey and other predator in the water.
The operculum is a flap of bone that protects the gills of the fish. The gills are the structures that perform gas exchange to allow the fish to breathe. Fish have scales that cover their bodies and protect them.
There are different type of scales on fish. Cycloid scales are smooth on the body of the fish. Ctenoid scales have a series of small teeth that feel roughy to the touch.
Ganoid scales are hard plates on the body of the fish and provides protection for the fish. Additionally, scientists can use the scales to determine the age of the fish. The growth rings on the scales determines the age of the fish and are refered to as annuli.
Fish have various internal organs that help them to perform the life processes necessary to survive. The swim bladder is an organ that allow the fish to maintain buoyancy. The fish is able to remain in the water without constantly swimming.
The heart of a fish have two chambers that pump the blood of the fish through its body. The kidneys are located along the spine of the fish and help to manage the salt levels in the body of the fish. The stomach and the intestines is the organs of the digestive system of the fish and are responsible for processing the nutrients from the food of the fish.
The position of the mouths of the fish indicates the type of eating behavior of the fish. Fish with a terminal mouth have their eating mouth located at the tip of the snout and is used for eating food in the middle of the water. Superior mouth has upturned lips and fish that eat at the surface of the water use them.
An inferior mouth is found on the bottom of the head of the fish and are used for eating food on the bottom of the water. By using the knowledge of the anatomy of fish, humans can improve the way that they fish for these product. For instance, by using lures for fish that vibrate, those fish will trigger the lateral line of the fish.
By placing bait at specific depths in the water based off the mouth position of the fish, the bait will attract the fish. Additionally, using this knowledge of anatomy help humans to understand how fish survive and perform the functions necessary to perform their behaviors.