many lineages displaying different jaw morphology that results in the same functional output in a similar or identical ecological niche. Reproductive behavior Most labrids are protogynous hermaphrodites within a haremic mating system. A good example of this reproductive behavior is seen in the California sheephead. Hermaphroditism allows for complex mating systems. Labroids exhibit three different mating systems: polygynous, lek-like, and promiscuous. Group spawning and pair spawning occur within mating systems. The type of spawning that occurs depends on male body size. Labroids typically exhibit broadcast spawning, releasing high numbers of planktonic eggs, which are broadcast by tidal currents; adult labroids have no interaction with offspring. Wrasses of a particular subgroup of the family Labridae, Labrini, do not exhibit broadcast spawning. Sex change in wrasses is generally female-to-male, but experimental conditions have allowed for male-to-female sex change. Placing two male Labroides dimidiatus wrasses in the same tank results in the smaller of the two becoming female again. Additionally, while the individual to change sex is generally the largest female, evidence also exists of the largest female instead "choosing" to remain female in situations in which she can maximize her evolutionary fitness by refraining from changing sex. Broodcare behavior of the tribe The subgroup Labrini arose from a basal split within family Labridae during the Eocene period. Subgroup Labrini is composed of eight genera, wherein 15 of 23 species exhibit broodcare behavior, which ranges from simple to complex parental care of spawn; males build algae nests or crude cavities, ventilate eggs, and defend nests against conspecific males and predators. In species that express this behavior, eggs cannot survive without parental care. Species of Symphodus, Centrolabrus, and Labrus genera exhibit broodcare behavior. Cleaner wrasse Cleaner wrasses are the best-known of the cleaner fish. They live in a cleaning symbiosis with larger, often predatory, fish, grooming them and benefiting by consuming what they remove. "Client" fish congregate at wrasse "cleaning stations" and wait for the cleaner fish to remove gnathiid parasites, the cleaners even swimming into their open mouths and gill cavities to do so. A single wrasse works for around four hours a day, and in that time, it can inspect more than 2,000 clients. Cleaner wrasses are best known for feeding on dead tissue, scales, and ectoparasites, although they are also known to 'cheat', consuming healthy tissue and mucus, which is energetically costly for the client fish to produce. The bluestreak cleaner