Have you ever sat around wondering how Spongebob learned to tie a Windsor knot, how Squidward acquired his affinity for the arts, or how Plankton became perceptive enough to develop a Napoleon complex? Well, here's a theory that should simultaneously quell your curiosity while fulfilling the core function of the internet: robbing you of your childhood innocence.

Basically, this unique aquatic society was the result of U.S. nuclear testing in the South Pacific Ocean, and that all of your childhood pals, from Mr. Krabs to Mrs. Puff, are radioactively mutated fish. 

The islands of Bikini Atoll

History seems to support this claim. The nuclear testing site that the theory refers to is Bikini Atoll, a group of islands in Micronesia. After World War II, the U.S. military detonated 23 nuclear devices on the islands as it geared up for an arms race with the Soviet Union. Remember that island that appears at the beginning of every SpongeBob episode? Well, that’s what remains of Bikini Atoll. The creators of the show left other clues to this radioactive origin story, such as Squidward’s Easter Island head residence (a hint of the town’s South Pacific locale), the popular Bikini Bottom magazine Toxic Waste Monthly, and the mushroom cloud that seems to rise from every explosion in the show. 

So, it seems likely that the bombing of Bikini Atoll created Bikini Bottom, a nightmarish seascape where a sponge is economically extorted by a crab, who somehow fathered a sperm whale. But maybe it was all for the best. Bikini Bottom seems like a pleasant enough city, and the residents certainly have less mundane lives than your average fish or sponge. All’s well that ends well, right?

Maybe not. Because before U.S. nukes created one of America’s most beloved children’s shows (the most useful thing a nuclear weapon has ever done, by the way), there were real, non-animated people living on Bikini Atoll: 167 to be exact. Bikini Atoll is part of the Marshall Islands, which has its own distinctive language, culture, and society. Leading a subsistence based lifestyle, Bikinians were a subset of this society.   

In 1946 the people of Bikini Atoll were compelled to “temporarily relocate” by the United States, who wanted to begin nuclear testing on the islands. They were told they had to leave “for the good of mankind” and were subsequently sent to Rongerik Atoll, an uninhabited group of islands one-sixth the size of Bikini that lacked adequate sources of food and water. The U.S. navy dropped them on the shore with several weeks of food supplies and left. Soon, the Bikinians had a serious malnutrition problem, with most living on the brink of starvation. Within two months of relocation, they were begging the U.S. to allow them to return to Bikini, not knowing about the nuclear devastation being brought down upon their home. Their calls were ignored, and they were left on the island for two years. “We were dying, but they didn’t listen to us,” commented one of the inhabitants of Rongerik. 

Map showing location of the Pacific Proving Grounds relative to rest of Pacific Ocean

Eventually, the government began the process of moving the Bikinians to Ujelang Atoll. A handful Bikinians were sent to Ujelang to begin construction of their new society. But two months later, the plans fell through. The U.S. had chosen a second location for nuclear testing, Enewetak Atoll, and decided that the Enewetak people, instead of the Bikinians, would be relocated to Ujelang. 

In 1948, The Bikini natives were finally liberated from Rongerik and sent to Kwajalein Atoll, where they lived in tents next to a concrete military airstrip. Six months later they were relocated once again to Kili Island, a .36-square-mile island where most Bikinians still live today. The island greatly differed from the Atolls they were accustomed to, making their traditional methods of fishing and food cultivation far less effective. Starvation once again became a daily concern and the Bikinians had to rely on USDA rice and canned goods to survive. The island was also prone to flooding, making them vulnerable to hurricanes and typhoons. They soon began referring to Kili as “Prison Island.”

Meanwhile, nuclear tests continued on Bikini Atoll, culminating in the 1954 “Castle Bravo” test, which detonated a nuclear weapon 1,000-times more powerful than the atom bomb dropped on Hiroshima. The blast was larger than the U.S. government expected and the resulting radioactive fallout spread throughout the Marshall Islands, blanketing inhabited islands and contaminating their residents. The subsequent health effects still plague Marshall Islanders today. 

Mushroom cloud at Castle Bravo

Decades passed, and in 1969, President Lyndon B. Johnson announced that the now 540 Bikinians would be able to resettle their home islands. The Atomic Energy Commission issued a statement saying “There's virtually no radiation left and we can find no discernible effect on either plant or animal life.” Feeling confident in these assurances, Bikinians began to resettle in 1972. But in 1978, tests by U.S. physicians revealed that the radiation levels in the 139 people on Bikini Atoll were well above the permissible level. They were evacuated.

Today, the native inhabitants of Bikini Atoll continue to seek compensation from the U.S. government for the devastation of their home. Many demand that the U.S. clean up the mess they made in Bikini so they might return home. Some have more modest claims, like Simon Jamore, who wants access to better healthcare for four of his family members who have developed cancer. The islands remain almost entirely uninhabited, excluding the marine citizens of Bikini Bottom. For now, the only thing fit to live in Bikini Atoll is a radioactive fry-cook sponge.