Marine scientists in Shark Bay, Australia say the local dolphins are using song and synchronized swimming (dancing) to attract a mate.
"You'll hear this, 'Click click click click', and the pace and the tempo will be matched by these tightly bonded males in this bromance world," Shark Bay Dolphin Research Alliance (SBDRA) co-director Simon Allen told Australia's ABC News
He said male dolphins in groups of four to 14 were performing synchronized movements and displays while singing in unison to attract females.
He has given the dances nicknames including "The Butterfly Display" and "The Tango".