Bony fish can secrete gas into them or take the gas out. Some swim bladders are not connected to the gut (physoclistous) and gas is level controlled using the blood stream. Others ARE connected to the gut and gas can be swallowed to be added or 'burped up' to remove it.Thus bony fish use their swim bladder.
The swim bladder is an internal gas-filled organ that contributes to the ability of many bony fish to control their buoyancy, and thus to stay at their current water depth without having to waste energy in swimming.
Is a special member to replace the lungs in the fish and bone under the skeleton, which is a bag filled with air allows the fish to float in the water when you want to, because of the possession of fish for swimming bladder, they still float although the bones heavier than the structure cartilage, Which in turn allows the organization of its density. This bag contains a gas that can change the pressure to the same pressure as the outside water, so it makes the fish weightless in the water at different depths, when the fish wants to rise, the blood vessels that spread on the walls of the bladder gases into the organ. So the fish float on the surface when you wish. When you want to dive deep, the blood vessels absorb the gases again. When the bladder empties, the fish sinks back into the deep.
Swim bladder, also called air bladder, buoyancy organ possessed by most bony fish. ... It contains gas (usually oxygen) and functions as a hydro-static, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking. Bony fish use the air within their swim bladder to stay buoyant in water. For some bony fish, the swim bladder is also used for breathing. In certain bony fish, the swim bladder is filled with oil instead of water.
Swim bladder, also called air bladder, buoyancy organ possessed by most bony fish. ... It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking.
Swim bladder | fish anatomy | Britannica.com
https://www.britannica.com/science/swim-bladder
The swim bladder is a special member to replace the lungs in the bone fish ... a bag filled with air that allows the fish to swim and float in the water when it wants
The reason for this is that most fish have a swim bladder. This is an internal gas filled organ that allows the fish to control its depth. The fish can adjust the pressure in the swim bladder to ascend or descend to whichever depth it chooses.
Bony fish use the air within their swim bladder to stay buoyant in water. Since air is lighter than water and pushes up, this keeps the fish from sinking to the bottom of the ocean. Fish with a swim bladder do not need to expend much energy to stay aloft and move through the water. It also has a secondary use for producing and receiving sound so that fish can create sounds to scare away predators or attract mates. For some bony fish, the swim bladder is also used for breathing. In certain bony fish, the swim bladder is filled with oil instead of water.
Reference: https://study.com/academy/answer/how-does-a-bony-fish-use-the-swim-bladder.html
Fish with a swim bladder do not need to expend much energy to stay aloft and move through the water. It also has a secondary use for producing and receiving sound so that fish can create sounds to scare away predators or attract mates.
Fish with a swim bladder do not need to expend much energy to stay aloft and move through the water. It also has a secondary use for producing and receiving sound so that fish can create sounds to scare away predators or attract mates.
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