Chinese fishing boats took half a billion dollars of illegal squid from North Korea. Scientists used satellites to catch them out

A "dark fleet" of hundreds of Chinese fishing vessels has illegally caught more than half a billion dollars worth of squid in North Korean waters since 2017, according to new research that used satellite technology, on-water observations and machine learning to track the unreported vessels. The illegal catch may have driven small North Korean fishing boats into dangerous waters and contributed to the sharp decline of the Japanese flying squid.