Drag coefficients of underwater animals.

<p>•, sailfish (present); ▪, swordfish (present); ▾, bluefin tuna <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Bernal1" target="_blank">[50]</a>; ▴, small-size rainbow trout <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Allan1" target="_blank">[26]</a>; △, small-size rainbow trout (without fins) <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Allan1" target="_blank">[26]</a>; ♦size rainbow trout <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Allan1" target="_blank">[26]</a>;⋄, pike <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Allan1" target="_blank">[26]</a>; □, dogfish <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0081323#pone.0081323-Allan1" target="_blank">[26]</a>. The drag coefficients of all the fishes shown in this figure were measured in their gliding postures. The solid and dashed lines represent the drag coefficients of smooth flat plate in turbulent and laminar boundary layer flows, respectively. Tiny horizontal bars on the data of sailfish and swordfish denote the error bars.