Juveniles often provide cleaning services to other fishes. Among adults, spawning occurs differently depending on the size of the reef. On large reefs, group spawning is the rule. On small reefs, terminal-phase males utilize mating territories. Males from ensuing generations frequently use their ancestral mating site, apparently as a result of social convention. Dozens of females may select the same spawning site, and thus mate with the same male. Groups of smaller males often mate with egg-laden females by ambushing them on their way to the territorial mating sites.
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