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swim bladder

noun
1.
air bladder (def 2).
Origin
1830-1840
1830-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for swim bladder
  • The first two sounds are produced by muscles contracting around the fish's swim bladder.
  • The lack of swim bladder inflation is a major problem in the intensive culture of several species of larval fish.
  • Burping is a method of expelling excess air from the fish's swim bladder.
  • The swim bladder has inflated and fish are feeding successfully or the fish dies.
  • The peak pressure will determine whether the swim bladder and ear are subjected to extreme mechanical stress.
  • Bluegills did not suffer swim bladder rupture in any tested scenarios.
  • Males produce a croaking sound by vibrating specially adapted muscles against their swim bladder.
  • They can survive in water with low oxygen levels because their unusual swim bladder allow them to breathe oxygen from the air.
  • Unlike other fish, sharks do not have a swim bladder to give them buoyancy.
  • Samples are taken primarily from kidney, spleen and the swim bladder tissues.
British Dictionary definitions for swim bladder

swim bladder

noun
1.
(ichthyol) another name for air bladder (sense 1)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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swim bladder in Science
swim bladder
  (swĭm)   
See air bladder.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for swim bladder

air bladder

buoyancy organ possessed by most bony fish. The swim bladder is located in the body cavity and is derived from an outpocketing of the digestive tube. 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 sound. In some species the swim bladder contains oil instead of gas. In certain primitive fish it functions as a lung or respiratory aid instead of a hydrostatic organ. The swim bladder is missing in some bottom-dwelling and deep-sea bony fish (teleosts) and in all cartilaginous fish (sharks, skates, and rays)

Learn more about air bladder with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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