Love On The Seafloor: The Instinctive Architecture of the Pufferfish

The male pufferfish don't upkeep their circles. Instead, the underwater currents sweep them away fairly quickly. So the pufferfish go to an area with fresh fine sentiment and build another pattern there come mating season. A study about this behavior was published in July 2013. [1] Alex Jordan, a researcher at the University of Texas at Austin who wasn't involved in this study, theorized that the small fish create such large circles to compensate for some biological reason "like poor visibility at depth, or distance between individuals that means males have to make large nests to be found by females."