Fishermen in northeast China were startled by the catch of a giant predatory sturgeon weighing more than half a ton.
The Kaluga is a large predatory sturgeon only found in the Heilongjiang River basin. Chen Lin, the fisherman who caught the fish said it was the biggest he had ever seen. Chen, along with fellow fishermen, sent the fish to a local sturgeon breeding station.
Kaluga fish are believed to have existed for 130 million years and are claimed to be the largest freshwater fish in the world. The fish is listed as critically endangered, having been fished to near extinction for its valuable roe, sold as caviar.