The horniest fish in the sea, Mandarin fish will hit the town/reef every evening at sunset in the search for action. Competition is fierce and bigger males tend to get more attention from the females. There's a lot of foreplay involved and at times you may find yourself thinking "come on guys, just get on with it". Once a couple unites the female sits on the male's pectoral fin, quick as a flash she releases her eggs and he sprays them with sperm.