What is the swim bladder?
The swim bladder is an internal, gas-filled organ found in most bony fish that allows them to regulate buoyancy without constantly swimming.
By adjusting the gas volume inside the swim bladder, fish can stay suspended at different depths with minimal energy use.
How the swim bladder works
Fish regulate buoyancy by:
- Absorbing gases from the blood into the swim bladder
- Releasing gases back into the bloodstream
This process allows fish to rise, sink, or remain neutrally buoyant in the water.
Swim bladder disorders
Swim bladder problems often cause:
- Floating upside down
- Sinking to the bottom
- Difficulty maintaining balance
Common causes include poor water quality, constipation, sudden temperature changes, and exposure to toxins like ammonia.
Prevention and care
- Maintain stable water parameters, including proper ph
- Avoid overfeeding
- Perform regular water changes
- Ensure proper tank setup for the species
A healthy swim bladder is essential for normal swimming behavior and overall fish well-being.