air bladder
Definition
Noun: 1. A gas-filled sac in many bony fishes: An internal organ, typically located near the spine, that contains gas and helps the fish control its buoyancy, allowing it to maintain its depth in the water without constant swimming.
Usage and Examples
- The air bladder allows a fish to stay suspended at a desired depth.
- Scientists studied how the air bladder adjusts its gas volume in response to pressure changes.
- Some fish, like sharks, lack an air bladder and must swim continuously to avoid sinking.
Advanced Usage and Notes
- The air bladder is also known as the or . These are the more common scientific terms.
- In some fish species, the air bladder has secondary functions, such as aiding in hearing or sound production.
Variants and Related Words
- Swim bladder (n): The most common synonym for air bladder.
- Gas bladder (n): Another precise synonym for air bladder.
Synonyms
- Swim bladder
- Gas bladder
- Float (in a general, non-technical sense)
Noun
-
an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
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