A Fish That Walks

In the journal Scientific Reports, a new paper reports the discovery of a blind cavefish that walks up the walls of waterfalls. The fish is reported to show changes to its spine and pelvic girdle that would support a walking movement like that of salamanders. Its fins also project laterally, presumably to help it walk. The discovery, if true, is a big deal, because it adds to the story of how fish may have evolved in tetrapods (animals walking on four feet).

Karl Zimmer has picked up the tal...