A small isopod crustacean of the family Sparidae that attaches to and parasitizes the oral cavity and gill cavity of Sparidae fish. Its body is yellow or yellowish-white, slightly asymmetrical, and oval-shaped. Males are slightly narrower in width than females, and their body lengths are about 1.5 cm for males and 3 cm for females, showing sexual heteromorphism. However, they are actually protoandrogenous hermaphrodites. Therefore, males later become females and lay eggs. The larvae live a planktonic life, but when they become adults, they live a completely parasitic life. Males and females often parasitize the same host at the same time. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
タイ科の魚類の口腔や鰓腔(さいこう)に付着,寄生している小型の等脚目タイノエ科の甲殻類。体は黄色または黄白色をしており,わずかに左右不相称を示し,小判形をしている。雄は体の幅がやや狭いが,雌では広い,体長も雄は1.5cm,雌では3cmくらいと雌雄異形を示しているが,実は雄性先熟の雌雄同体である。したがって,雄がのちに雌となって産卵する。幼生は浮遊生活をするが,成体になると完全に寄生生活をする。雌雄が同時に同一宿主に寄生していることも多い。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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