physoclistous

Updated About encyclopedia.com content Print Article Share Article
views updated

physoclistous Applied to the condition in bony fish in which there is no connection or duct between the swim-bladder and the intestinal tract. In physoclists, the gas pressure of the swim-bladder is regulated by special tissues or glands. This condition is found among the ‘higher’ bony fish (e.g. the perch-like fish, Perciformes).