ScienceActually<p>Some species of sharks have a spiracle that allows them to pull water into their respiratory system while at rest.</p><p><a href="https://sfba.social/tags/science" class="mention hashtag" rel="tag">#<span>science</span></a> <a href="https://sfba.social/tags/sciencefacts" class="mention hashtag" rel="tag">#<span>sciencefacts</span></a> <a href="https://sfba.social/tags/shark" class="mention hashtag" rel="tag">#<span>shark</span></a> <a href="https://sfba.social/tags/breathing" class="mention hashtag" rel="tag">#<span>breathing</span></a> <a href="https://sfba.social/tags/spiracle" class="mention hashtag" rel="tag">#<span>spiracle</span></a> <a href="https://sfba.social/tags/spiracles" class="mention hashtag" rel="tag">#<span>spiracles</span></a></p>