Metacercarial cysts of the parasite Scaphanocephalus (Platyhelminthes: Trematoda: Heterophyidae) are frequently found on the pectoral fins and skin of parrotfishes (Labridae: Scarini) inhabiting Okinawan coral reefs in southern Japan. The prevalence of metacercarial cysts in 30 parrotfish species was investigated and compared through a market survey. Although parasite prevalence differed between parrotfishes, all species examined are considered to be suitable hosts. Prevalence was high in Scarus chameleon (38.5%, n = 13), S. rubroviolaceus (33.4%, 2797), S. ghobban (26.6%, 6441), and several other species that share, in part, common feeding habits. Conversely, prevalence was low in S. prasiognathos (0.4%, 1842), Bolbometopon muricatum (0.4%, 270), and Hipposcarus longiceps (0.1%, 8512) which have different feeding habits. Despite a few exceptions, feeding ecology and other indirect behaviors are considered to affect the prevalence of metacercarial cysts in parrotfishes. Taxonomic affiliation and nocturnal mucous cocoon usage are not considered to affect parasite prevalence.

常见于日本南部冲绳珊瑚礁的鹦嘴鱼（Labridae：Scarini）的胸鳍和皮肤上经常发现寄生于头颅的Scaphanocephalus（Platyhelminthes：Trematoda：Heterophyidae）的cer骨囊肿。通过市场调查调查并比较了30种鹦嘴鱼的cer脏囊肿的患病率。尽管在鹦嘴鱼之间寄生虫的流行程度有所不同，但所有被检物种都被认为是合适的寄主。Scarus变色龙（38.5％，n = 13），S。rubroviolaceus（33.4％，2797），S。ghobban（26.6％，6441）以及其他部分具有共同喂养习惯的其他物种的患病率很高。相反，在S. prasiognathos中患病率低（0.4％，1842），蚕豆（0.4％，270）和长沙棘（0.1％，8512）具有不同的喂养习惯。尽管有一些例外，但喂养生态和其他间接行为被认为会影响鹦鹉鱼中meta囊的患病率。分类学隶属关系和夜间粘膜茧的使用不被认为会影响寄生虫的流行。