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pelvic fin /ˈpɛdəl ˈɡland/ n

中文：腹鳍

中文 · 腹鳍Español · aleta abdominalFrançais · nageoire pelvienne
Meaning：Swimming appendage formed of a membrane and rays located on the ventral surface of the body; it helps especially in maintaining equilibrium.
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Perch anatomy Cartilaginous fish

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