Operculum (fish) 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 suboperculum is rectangular in
Caudal luring Caudal luring Caudal luring is the use of tail movements by a predator to attract prey animals that think the tail is a worm or other smaller prey and approach within the striking range of the predator. The definition of caudal /ˈkôdl/ 1. of or like a tail. 2. at or near the tail or the posterior part of the body. Caudal luring is a form of mimicry classified formally as aggressive mimicry, but perhaps better described by the term feeding mimicry. It is also an example of deception in animals. The behaviour is employed by a number of snake