Chinese Paddlefish

The Chinese paddlefish (Psephurus gladius) was a giant freshwater fish once endemic to the Yangtze River basin of China, and one of only two species in the ancient family Polyodontidae, alongside its sister species the American paddlefish. Among the largest freshwater fish ever documented, some historical records describe individuals reaching well over 3 meters in length. Following decades of overfishing, habitat loss, and river fragmentation from dam construction, no confirmed sightings occurred after the early 2000s, and the species was formally declared extinct by conservation assessments around 2019-2022, marking the loss of an ancient and distinctive freshwater lineage.

Historical records and museum specimens describe the Chinese paddlefish by these features:

• An extremely long, sword-like, flattened rostrum, longer and more pointed than that of the American paddlefish
• Silvery-gray, smooth, largely scaleless skin
• A very large mouth adapted for capturing prey rather than filter feeding
• A deeply forked, shark-like tail
• Enormous size, among the largest freshwater fish on record Its more elongated, blade-like snout and active predatory feeding habit distinguished it from its plankton-filtering American relative. Preserved museum specimens remain the primary basis for confirming these identifying features today.

The Chinese paddlefish historically inhabited the main channel and larger tributaries of the Yangtze River in China, along with associated lakes and the river's estuary near the East China Sea. It favored large, slow-moving stretches of river with abundant fish prey. Extensive damming, including construction of the Gezhouba and Three Gorges dams, fragmented its range and blocked migratory routes, contributing directly to its extinction alongside decades of overfishing. Its historic distribution once spanned nearly the entire length of the river and several connected lake systems.

Unlike its filter-feeding American relative, the Chinese paddlefish was an active predator, using its long rostrum, believed to aid in sensing prey, while hunting small fish in the Yangtze's turbid waters. It likely undertook migrations within the river system for spawning, similar to other large river fish. Overfishing and the blocking of migratory pathways by dam construction caused a rapid population collapse through the late 20th century, culminating in its formal declaration as extinct by international conservation assessments.