High-tech tags are revealing a side of the Hector’s dolphin the world rarely sees – its showstopping acrobatics beneath New Zealand’s waters. At just 1.4 meters (4.5 feet) long, Hector's dolphins (Cephalorhynchus hectori) are the smallest marine dolphins in Earth’s seas. <span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span>It showed that, below the surface, these tiny cetaceans were experts at performing acrobatic flips, barrel rolls, and dives up to 120 meters (nearly 400 feet) deep. <span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span><span class="fr-mk" style="display: none;"> </span>The study’s ultimate goal goes beyond capturing their underwater dances. Like many dolphins, Hector’s dolphins are vulnerable to getting entangled in fishing gear, which poses a significant threat to the species' survival.