https://community.usms.org/swimming/f/general/8793/is-underwater-dolphining-kicking-equivalent-to-fly-kickI never kicked underwater when I was an age grouper. But I now find kicking on the surface too uncomfortable and kicking underwater is kind of fun (especially with fins). I&#39;ll do full 25s underwater with fins. Or without fins I&#39;ll do four or five kicksen-USTelligent Community 12https://community.usms.org/thread/137674?ContentTypeID=1Fri, 15 Jan 2010 11:20:00 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:7e30e1e7-5cb6-439f-85fa-858cb9ef903dFormer MemberButterfly uses the dolphin kick. I find, however, that there are subtle differences in how I perform the dolphin kick on the surface of the water (i.e., while I am swimming butterfly) and when underwater. Basically, however, an underwater dolphin kick is equivalent to the kick used in butterfly.<div style="clear:both;"></div>