Update mexican_tetra.html

Author: fberio

mexican_tetra.html

@@ -136,13 +136,10 @@ <h1>Navigation abilities<br><em> in blind fish</em></h1>
                     <!-- <div class="dji-container">
                         <img src="img/image18.jpg" alt="column" style="width:100%" class="back-img">
                         <div class="row yann-left"> -->
-                    <div class="col-md-6">
+                    <div class="col-md-12">
                         <img src="img/zebrafish_shoaling.jpg" alt="Zebrafish shoaling &copy; Valentina Di Santo"
                             title="Zebrafish shoaling &copy; Valentina Di Santo" class="rounded-corner">
                     </div>
-                    <div class="col-md-6">
-                        <img src="img/flowtank.jpg" alt="Flowtank" title="Flowtank" class="rounded-corner">
-                    </div>
                 </div>
                 <div class="row">
                     <div class="dji-container">