I Once Caught a Po River

River catfish

pPhoto: Two boys carrying river catfish/pTwo boys lug weighty river catfish in Cambodia. Once a staple food in Cambodia, catches of these large, slow-maturing fish have dropped 90 percent in the past 20 years.

Photograph courtesy Zeb Hogan

Fast Facts

Type: Fish Diet: Omnivore Average life span in the wild: Unknown Size: 5 ft (1.5 m) Weight: Up to 99 lbs (45 kg) Did you know? One in every four freshwater fish, and one in every ten of the world's fish, is a catfish. Relative: Size relative to a 6-ft (2-m) man

Please add a "relative" entry to your dictionary.

The river catfish may be overshadowed by its famed cousin, the Mekong giant catfish, which shares the same river system in Southeast Asia. But this less celebrated species is a remarkable fish in its own right and, at 5 feet (1.5 meters) and 99 pounds (45 kilograms), it has no apologies to make in the size department.

Map: Giant catfish rangeRiver catfish are known to inhabit Tonle Sap Lake in Cambodia. Every year they leave the lake and enter the Mekong River as part of their annual spawning cycle. Breeding begins at the onset of the region's rainy season (May-July).

These unique fish have the nickname "iridescent shark catfish, " a seemingly ill-suited comparison for a toothless, freshwater fish. The nickname arises from its tendency to swim close to the surface, raising its dorsal fin above the water. As for iridescence, river catfish have no scales, but their delicate skin is covered with a protective layer of slime that gives them a shiny glow.

These fish are threatened with habitat fragmentation, industrial pollution, and overfishing. Many millions of people depend on the Mekong River for sustenance, and river catfish have long been targeted for their succulent meat.

They are extensively farmed along some sections of the river, such as in Thailand, where wild specimens have become quite rare.

Source: environment.nationalgeographic.com
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