Why are these sharks doing the 'pipi' dance? - Livescience.com

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Why are these sharks doing the 'pipi' dance?  Livescience.com
https://news.google.com/__i/rss/rd/articles/CBMiPGh0dHBzOi8vd3d3LmxpdmVzY2llbmNlLmNvbS9zaGFya3MtcGlwaS1kYW5jZS1hdXN0cmFsaWEuaHRtbNIBQGh0dHBzOi8vd3d3LmxpdmVzY2llbmNlLmNvbS9hbXAvc2hhcmtzLXBpcGktZGFuY2UtYXVzdHJhbGlhLmh0bWw?oc=5

2020-02-07 14:30:00Z
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