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The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ in bony fish (but not cartilaginous fish [1]) that functions to modulate buoyancy, and thus allowing the fish to stay at desired water depth without having to maintain lift via swimming, which expends more energy. [2]
The totoaba swim bladder is often used for identification more than a morphological description of the fish due to the illegal trade of it. Recent research in 2024 has created a way to identify totoaba swim bladders on-site of legal and illegal trades, that is efficient, convenient, inexpensive, and gives reliable results called real-time ...
This page was last edited on 16 December 2023, at 02:02 (UTC).; Text is available under the
[37]: p. 219 In freshwater fish the bladder is a key site of absorption for many major ions [38] in marine fish urine is held in the bladder for extended periods to maximise water absorption. [38] The urinary bladders of fish and tetrapods are thought to be analogous while the former's swim-bladders and latter's lungs are considered homologous.
Fish physiology is the scientific study of how the component parts of fish function together in the living fish. [2] It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes. In practice, fish anatomy and physiology complement each other, the former dealing with the structure of a fish, its organs or ...
Swim bladder disease, also called swim bladder disorder or flipover, is a common ailment in aquarium fish. The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy , and thus to stay at the current water depth without having to waste energy in swimming. [ 1 ]
The urinary bladder of teleosts is permeable to water, though this is less true for freshwater dwelling species than saltwater species. [37]: p. 219 In freshwater fish the bladder is a key site of absorption for many major ions [46] in marine fish urine is held in the bladder for extended periods to maximise water absorption. [46]
The physostome fish encompass the bichirs, gars, a number of carps, trouts, herrings, catfish, eels and the lungfish. While the gas bladder in fish mainly serves as a buoyancy organ, some physostomes (though not all) can use their gas bladder as a lung , allowing them to live from atmospheric oxygen in conditions where aquatic oxygen levels ...