Photograph courtesy Zeb Hogan
- Average life span in the wild:
- 50 years
- Up to 6.5 ft (2 m)
- Up to 200 lbs (90 kg)
- Protection status:
- Did you know?
- The largest recorded taimen ever caught weighed in at 231 pounds (105 kilograms) and was 83 inches (210 centimeters) long.
- Size relative to a 6-ft (2-m) man:
The taimen is the largest member of the salmonid family, which also includes trout and salmon. These fish are fierce predators that sometimes chase their prey in packs, a practice that earned them the nickname "river wolves."
They have gray-green heads with streamlined, reddish-brown bodies. And they can be enormous, with particularly large specimens reaching six feet (two meters) long.
Taimen, also called giant Eurasian trout, are notoriously voracious and have a varied diet that includes primarily fish, but also ducks and even mammals like rats or bats. These insatiable fish will also prey upon one another. Some large taimen are known to have suffocated while trying to swallow a slightly smaller member of their own species.
Taimen once swam in rivers from the Russian Pacific Coast westward throughout the former Soviet Union and Mongolia. Today they have been wiped out from much of their range, and significant populations remain only in Russia and Mongolia.
This riverine behemoth is revered by many Mongolian Buddhists as the child of an ancient river spirit, and it has long enjoyed relative peace in Mongolia, where the nomadic culture has traditionally eschewed fishing. But shifting lifestyles in modernizing Mongolia have meant more logging, mining, and grazing, which have harmed water quality in the taimen's range. And fishing, which has driven the taimen to near extinction in China, is beginning to take a toll in Mongolia.
Taimen are spread sparsely throughout their habitat. A study of some 60 miles (100 kilometers) of the rivers where the fish still thrive revealed only about 2,000 "catchable" taimen—those 26 inches (66 centimeters) or bigger. Because of their scarcity, the removal of even a single large fish can be critical.
Today recreational taimen fishing has become an international drawing card and a significant revenue source for regional economies. Mongolian officials, together with several nonprofit organizations, are trying to find a balance to curb poaching yet promote regulated fishing and the revenue it brings.
Help Save the Colorado River
You can help restore freshwater ecosystems by pledging to cut your water footprint. For every pledge, Change the Course will restore 1,000 gallons back to the Colorado River.
Sandra is a leading authority on international freshwater issues and is spearheading our global freshwater efforts.
He's paddled the Colorado River from its headwaters to the delta, in an effort to bring awareness to this mighty river at risk.
For more than 15 years, Osvel Hinojosa Huerta has been resurrecting Mexico's Colorado River Delta wetlands.
Support the Freshwater Initiative
Water Currents, by Sandra Postel and Others
Find out with our footprint calculator, then pledge to cut it!
Find out how much water it really takes to support your lifestyle.
Help lower your global water footprint and conserve water. Learn what you can do to help.