ventral fin

基本解釋

By 30 days, the bud of ventral fin appeared;
孵出后第30天，腹鰭芽出現(xiàn)；
Dorsal fin , tail fin and fat fins slightly yellow, pectoral fin , and ventral fin Tunqi gray.
背鰭、脂鰭和尾鰭稍帶淺黃色，胸鰭、腹鰭和臀鰭灰白色。
The design is a nod to freshwater knifefish, which can move forward and backward, and hover, by rippling an elongated ventral fin.
Gymnobot的設(shè)計(jì)靈感來自于一種名為寶刀魚（knifefish）的淡水魚，這種魚利用腹部長(zhǎng)長(zhǎng)的魚鰭，在水中可以進(jìn)退自如，還可以作出水中盤旋等動(dòng)作。