swim bladder (air bladder; gas bladder) An air-filled sac lying above the alimentary canal in bony fish that regulates the buoyancy of the animal. Air enters or leaves the bladder either via a pneumatic duct opening into the oesophagus or stomach or via capillary blood vessels, so that the specific gravity of the fish always matches the depth at which it is swimming. This makes the fish weightless, so less energy is required for locomotion. In lungfish it also has a respiratory function. The lungs of tetrapods are homologous with the swim bladder, which has developed its hydrostatic function by specialization.
More From encyclopedia.com
Fish Meal , fish meal Surplus fish, waste from filleting (fish‐house waste), and fish unsuitable for human consumption are dried and powdered. The resultant meal… garfish , garfish •raffish • damselfish •catfish, flatfish •garfish, starfish •redfish •elfish, selfish, shellfish •devilfish •crayfish, waifish •stiffish • ki… Ichthyology , Ichthyology is the branch of zoology (the study of animals) that deals with fish. It includes the study of the development, anatomy (structure), phys… Monkfish , monkfish •raffish • damselfish •catfish, flatfish •garfish, starfish •redfish •elfish, selfish, shellfish •devilfish •crayfish, waifish •stiffish • k… Fish And Fishing , The Bible says that humans are to exercise dominion over the fish as well as over all other subhuman life (Gen. 1:28). Fish are divided into clean an… Fish Curing , fish curing: Methods of curing fish by drying, salting, smoking, and pickling, or by combinations of these processes have been employed since ancient…
About this article
All Sources -
Updated Aug 24 2016 About encyclopedia.com content Print Topic
You Might Also Like