On April 25, 1977, a Japanese deep-sea trawler named the 'Ruiyang Maru' accidentally caught an unprecedented creature while fishing in waters near New Zealand. Initial observations revealed that it was a massive creature resembling a reptile, measuring 10 meters in length, with a neck of 1.5 meters and a tail of 2 meters, weighing nearly 2 tons. Scientists speculate that it could be an extinct plesiosaur or an unknown species of shark, but due to insufficient evidence, the debate continues to this day.