Edit No.017_Northern Right Whale Dolphin -翡翠色(ひすい)- [ SteamPunkWhales ]

#[No.017]NORTHERN RIGHT WHALE DOLPHIN #セミイルカ ##Toothed Whale -ハクジラ亜目- The dolphin is unique among cetaceans in that it does not have a dorsal fin. Because the density of water is 800 times greater than the density of air, they swim faster with less energy by "porpoising," which means they swim under the surface of the water while repeatedly jumping horizontally. They are often seen with Pacific white-sided dolphins. ハクジラ類には珍しい、背びれを持たないイルカ。 水中の密度は空気の密度の800倍以上なので、より少ないエネルギーでより早く泳ぐため、水平方向のジャンプを繰り返しながら、水面下を泳ぐ”ポーパシング"を行う。 カマイルカとよく一緒にいる。