For another, the blubber between their tail flukes and dorsal fin is crosshatched with an especially dense array of collagen and elastic fibers ​ — a design that gives the tail elasticity and stores mechanical energy.
Teiseks, sabas ja seljauimes sisalduvas rasvas paiknevad eriti tihedalt kollageensete ja elastsete kiudude viirud. Selline ehitus annab sabale elastsuse ja talletab mehhaanilist energiat.