either of a pair of fins attached to the pelvic girdle in fishes that help control the direction of movement; correspond to hind limbs of a land vertebrate
ventral fin 片语
片语
ventral fin rays臀鳍
ventral fin sinus腹鳍窦
ventral l fin腹鳍
pelvic fin[鱼] 腹鳍
fūkkèih ventral fin腹鳍
pelvic bone and ventral fin腰带和腹鳍
ventral finpelvic fin腹鳍
ventral adipose fin腹面脂鳍
ventral fin 例句
英汉例句
dorsal fin , tail fin and fat fins slightly yellow, pectoral fin , and ventral fin tunqi gray.