Operculum (fish) required, such as ventilation.. Operculum (fish) The operculum is a series of bones found in bony fish that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organisms canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The
Caudal Deportivo status. Caudal Deportivo Caudal Deportivo is a Spanish football team based in Mieres, in the autonomous community of Asturias. Founded in 1918 it plays in Segunda División B – Group 2, holding home matches at "Estadio Hermanos Antuña" (built in 1951), with a capacity of 2,850 spectators. In 1914 "Sporting de Mieres" was founded, without any link to the Football Federation, and the club disappeared four years later, demoralized by the constant losses. That same year, on 6 July and after a draw to choose the name, "Racing Club de Mieres" was created, with the team being renamed "Caudal Deportivo