<figure class="fr-image-container fr-full"><img srcset="https://cdn.discovermagazine.com/assets/image/28845/catfish-s.webp 480w, https://cdn.discovermagazine.com/assets/image/28845/catfish-m.webp 660w" sizes="(max-width: 480px) 480px, 660px" src="https://cdn.discovermagazine.com/assets/image/28845/catfish-s.jpg" title="catfish.jpg" loading="lazy" data-id="28845"><figcaption class="fr-figcaption"><p class="fr-caption"></p></figcaption></figure><p>A newly-discovered species of catfish can use its fins for more than swimming. From the top side, <a href="http://digitallibrary.amnh.org/dspace/handle/2246/5946" title=""><em>Lithogenes wahari</em></a> looks like any other catfish, except with some extra body armor. But flip it over and you'll see a giant sucking mouth and a pair of fleshy pelvic fins, which it uses to grasp and shimmy up slippery rocks in fast-flowing rivers. Scientists first laid eyes on the strange fish 20 years ago in Venezuela. But the only specimen they had was in such bad condition that it "looked like it had been run over by a truck," <a href="http://www.livescience.com/animals/090122-climbing-catfish.html" title="">recalls</a> researcher <a href="http://research.amnh.org/ichthyology/staff/schaefer/schaefer.html" title="">Scott Schaefer</a>. It took years before the team was able to locate more of the species, which they found in abundance in a tributary of the Orinoco river. Capturing <em>L. wahari</em> was easy: the researchers easily picked 84 specimens off of rocks.  The unusual morphology of <em>L. wahari</em> means it has similarities with two different families of catfish, say the researchers. For now, it is being classified in a special subfamily, Lithogeninae, which contains only two other members. The only other species of catfish known to use fins for vertical climbing is found in high elevation streams of the Andes mountains. Related Content: Discoblog: <a href="/planet-earth/new-species-alert-hot-pink-millipede-collosal-spider-and-tiny-deer-emerge" title="">New Species Alert! Hot Pink Millipede, Colossal Spider, and Tiny Deer Emerge</a> DISCOVER: <a href="/planet-earth/darwins-lost-world" title="">Darwin's Lost World</a>, another strange catfish <em>Image: Scott Schaefer</em></p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile-desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-0"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div>

Discover the newly-discovered species of catfish, Lithogenes wahari, known for its fleshy pelvic fins and climbing abilities.

Planet Earth

Fish that Climb? New Catfish Scales Rocks with Pelvic Fins

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Nina Bai

Science

A newly-discovered species of catfish can use its fins for more than swimming. From the top side, Lithogenes wahari looks like any other catfish, except with some extra body armor. But flip it over and you'll see a giant sucking mouth and a pair of fleshy pelvic fins, which it uses to grasp and shimmy up slippery rocks in fast-flowing rivers. Scientists first laid eyes on the strange fish 20 years ago in Venezuela. But the only specimen they had was in such bad condition that it "looked like it had been run over by a truck," recalls researcher Scott Schaefer. It took years before the team was able to locate more of the species, which they found in abundance in a tributary of the Orinoco river. Capturing L. wahari was easy: the researchers easily picked 84 specimens off of rocks.  The unusual morphology of L. wahari means it has similarities with two different families of catfish, say the researchers. For now, it is being classified in a special subfamily, Lithogeninae, which contains only two other members. The only other species of catfish known to use fins for vertical climbing is found in high elevation streams of the Andes mountains. Related Content: Discoblog: New Species Alert! Hot Pink Millipede, Colossal Spider, and Tiny Deer Emerge DISCOVER: Darwin's Lost World, another strange catfish Image: Scott Schaefer

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会爬鱼？ 新型鲶鱼用腹鳍攀岩

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Nina Bai

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会爬鱼？新型鲶鱼用腹鳍攀岩