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anal fin /ˈeɪnəl ˈklaspə/ n

中文：臀鳍

中文 · 臀鳍Español · aleta analFrançais · nageoire anale
Meaning：Swimming appendage formed of a membrane and rays located on the middle ventral portion of the body behind the anus; it provides stability.
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Perch anatomy Cartilaginous fish

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