Probably, every person, looking at the aquarium,feels some strange feelings. It's both calm and relaxed. And was not someone fishing? You must remember these feelings, this excitement, sports interest. Also, many people have always been interested in knowing what the fish are swimming with, how they do it? Therefore, in order to understand how fish swim, it is necessary to understand in more detail their anatomy.
Inside the fish is a swim bladder,which is an organ from the film. This organ is connected to the intestine of the fish. To move in the water, the fish regulates the volume of gas in its swimming bladder.
The density of the body of a fish is equal to the density of water, thereforeThe fish is additionally held in a vertical floating position due to this peculiarity of its organism. Also, each representative of this series of wildlife of the water depths regulates their movement at the expense of fins.
Stay in a vertical position to the fish helps the dorsal and anal fin, and the pectoral fins move the fish forward. The tail also explains why the fish swim. It functions as:
- Steering wheel
- The main "engine" of fish.
Muscles that are located along the body of the fish, toohelp her to move in the water. When the fish wriggles all over its body, it strains and relaxes the muscles from one side, and then the other. So there is a swimming movement, which resembles the movement of a snake.
Thus, the fish has a whole system and mechanism of organs, so that it can swim. There are still some features of the structure of the body of fish that help it faster and easier to move:
- The body of each fish is smooth and smooth outlines, which reduces the resistance of water during movement.
- The skin of the fish is covered with a special mucus, which adds slip and smoothness in movement.
Quickly floating fish have the sameproperties that ordinary fish, but their muscles are stronger, and the fins are larger and more mobile. Therefore, the fish can develop speed, which helps to hunt smaller fish and quickly escape from predators.
Constantly in motion
Sharks and sailfishes do not have swimmingbubbles, so they have to stay in the water only at the expense of the pectoral fins. They perform the same functions as the wings of the aircraft. In order not to drown, the fish have to constantly be in a state of movement.
Bottom fish species rarely surfacewater, because there they are immediately noticeable and attractive to predators. These fish have a flattened back, because they do not need to constantly swim. These species are represented by gobies, flounder, stingrays and astrologers. Totally flat fish, for example, stingrays - this is the kind of aquatic population that has turned its fins into the sides of the body. Therefore, they can swim thanks to the waves that run through their flat outline of the body.
But the fish, which are in constantmovement, among the water spaces, have a body and a head flattened on the sides. These fish make a move forward, bending their body like a spring. All their efforts are movement, reduction of all lateral muscles of the body, which is concentrated on each tail stroke. So fish swim at the surface of the water, looking for a small plankton, or they swim away from predators, and can simply simply dissect the water column.
If the fish swims upward with the belly, there may be several factors:
- binge eating;
- disease of various kinds;
There are also special types of swimming, amongrepresentatives of fish: sea needles and skates turned their caudal fins into a regular tail. Therefore, they move through their dorsal fins. The world of fish is very diverse, there are its representatives who not only swim, but also walk on the bottom, like, for example, sea cocks and dogs.