Japanese officials are at a loss to explain why an estimated 1,300 tons of dead fish suddenly washed ashore on a beach in the northern part of the country. The unsettling case reportedly occurred last Thursday when the coastal city of Hakodate was inundated by waves carrying the remains of thousands of unfortunate sardines and mackerel. A staggering half-mile long stretch of shoreline was ultimately covered by the dead fish which were subsequently swept up by residents concerned that their presence could prove detrimental to the local environment. As for what could have caused the curious event, Japanese officials concede that the strange incident has left them stumped.

Among the possibilities put forward by wildlife experts are that the fish wound up stranding themselves while trying to evade a particularly pernicious predator or that a drop in water temperature led to their demise. Meanwhile, authorities have understandably pushed back against claims that the creatures perished due to water that was recently released from the Fukushima power plant, declaring that this is a conspiracy theory "that's not based on scientific evidence." An investigation into the mass die-off is currently underway with the officials hoping to find a definitive answer for what was behind the event and put the proverbial radioactive speculation to rest.