<p><strong><em>Rebellatrix,</em> a newfound species of <a href="http://animals.nationalgeographic.com/animals/fish/coelacanth.html">coelacanth</a>, chases down <a href="http://science.nationalgeographic.com/science/prehistoric-world/triassic/">Triassic</a> prey in an illustration.</strong></p><p>The coelacanth (pronounced SEE-la-kanth) is a primitive, slow-moving fish that's sometimes called a living fossil, because it apparently existed largely unchanged for 320 million years.</p><p>There are 40 known coelacanth species, 2 of which are alive today. All other known coelacanths have broad, rounded tails designed for slow bursts of motion.</p><p>But <em>Rebellatrix</em> had a huge, forked tail and streamlined body that likely allowed the ancient fish to cruise long distances and hunt prey at high speeds, said study leader<a href="http://www.biology.ualberta.ca/faculty/mark_wilson/?Page=6854"> Andrew Wendruff</a>, a biologist at the University of Alberta in Canada.</p><p>According to Wendruff, the team named the discovery <em>Rebellatrix</em> because, like a true rebel, "it does everything a coelacanth should not do."</p><p>(<a href="http://news.nationalgeographic.com/news/2012/05/120502-killer-coelacanth-new-species-rebel-fish-animals-science">Read the full story.</a>)</p><p><em>—Christine Dell'Amore</em></p>