Trnovka arktická (Limacina helicina) v pohybu (D.W.Murphy et al., Underwater flight by the planktonic sea butterfly, Journal of Experimental Biology 2016 219: 535-543; doi: 10.1242/jeb.129205).

Trnovka arktická (Limacina helicina) v pohybu (D.W.Murphy et al., Underwater flight by the planktonic sea butterfly, Journal of Experimental Biology 2016 219: 535-543; doi: 10.1242/jeb.129205).