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The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ that contributes to the ability of many bony fish (but not cartilaginous fish [1]) to control their buoyancy, and thus to stay at their current water depth without having to expend energy in swimming. [2]
Swim 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. It also serves as a resonating chamber to produce or receive sound.
Although commonly seen in goldfish and bettas, swim bladder disease can affect virtually any species of fish. The disorder is often treatable, and a fish can experience a full recovery. Here's what you need to know about swim bladder disease in fish.
A swim bladder (also called an ‘air bladder’ or ‘gas bladder’) is a gas-filled bag that sits in a fish’s body cavity, above its guts. The acquisition of a swim bladder, with the neutral buoyancy it gives to its possessors, was one of the crucial steps in the evolution of modern fish.
The swim bladder is also known as the air bladder, fish maw, or gas bladder as well. The swim bladder is located in the center mass of the fish and is a derivative of the digestive cavity of the fish. It is a buoyancy organ, in simplest terms.
The trick is the swim bladder, which is basically like an air-inflated balloon that can expand and contract depending on how much gas is inside. When the swim bladder expands it will...
The swim bladder is a thin-walled sac located inside the body of the fish that is usually filled with gas. Besides helping the fish stay buoyant, it can also function as a sound producer and receptor or as an accessory respiratory organ.