seconde nageoire dorsale
/səɡˈɔ̃t asistˈɑ̃kadʁˈœʁ/
n
English: second dorsal fin · 第二背鳍
Sens：Swimming appendage formed of a membrane and rays located on the middle posterior dorsal portion of the body; it provides stability.
English: second dorsal fin · 第二背鳍