How much effort are you willing to put in to attract that special someone? The humble Japanese pufferfish, just twelve centimeters long when un-puffed, almost certainly has you beat. To attract the best fish in the sea, male pufferfish spend at least seven 24-hour days completing an intricate mating ritual that involves swimming their bodies into and through the seafloor to form ridges and trenches in the sand. If they pause too early, the entire ordeal gets washed away by currents.
