Chonkers is a Steller sea lion, unlike the many California sea lions that usually visit the marina. Screenshot: Pier 39 Live Cam via Reddit Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. The average male Steller sea lion ( Eumetopias jubatus ) is about 10-feet-long and weighs around 1,200 pounds. But Chonkers is no average sea lion . At an estimated 2,000 pounds , the absurdly humongous, Redditor-nicknamed marine mammal has captivated onlookers and imposed himself on his fellow sunbathers ever since he arrived at San Francisco’s Pier 39 in early April. Sea lions routinely visit the Bay Area for its vast sources of fish, as well as the chance to simply hang out together. These gatherings are part of what makes them who they are. Sea lions are thigmotactic, the scientific term for animals who buddy up and cuddle with one another or stay in contact with hard surfaces for security and warmth.…