Fishers and scientists announced this week the catch, and release, of what is likely the world's largest known freshwater giant stingray. The giant stingray, weighing an estimated 550 to 990 pounds (250 to 450 kilograms) was reeled in on January 28, 2009, as part of a National Geographic expedition in Thailand.
The stingray's body measured 6.6 feet (2 meters) wide by 6.9 feet (2.1) meters long. The tail was missing. If it had been there, the ray's total length would have been between 14.8 and 16.4 feet (4.5 and 5 meters), estimated University of Nevada Biologist Zeb Hogan. Hogan was in Thailand searching for giant fish as part of the Megafishes Project—an effort to document Earth's 20 or so freshwater giants.
The new find gives Hogan hope that the giant stingray, once overfished, may be more abundant than previously thought. And it may confirm the giant stingray as the heavyweight champ of the Megafishes Project. "Honestly, we just don't know how much it weighed. But it's clear that the giant stingray has the potential to be the largest freshwater fish in the world," said Hogan, also a National Geographic Emerging Explorer. (National Geographic News is owned by the National Geographic Society.)
"The Thai populations were once considered critically endangered, although with the discovery of new populations the stingray's abundance appears higher than previously believed," added Hogan. The International Union for Conservation of Nature (IUCN) currently lists the freshwater giant stingray as vulnerable.
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Fishers and scientists announced this week the catch, and release, of what is likely the world's largest known freshwater giant stingray. The giant stingray, weighing an estimated 550 to 990 pounds (250 to 450 kilograms) was reeled in on January 28, 2009, as part of a National Geographic expedition in Thailand. 
Source
Insect size limited by oxygen
Worlds largest ever snake discovered
Truth found in tales of monster fish
Group finds dog-sized gigantic toad
Life confusing for two-headed snakes
Heads spinning over 200-yard spider web
New frog species found in Thailand
Do animals have emotions ?
10ft shark mauled by 20ft behemoth
Are mobile phones wiping out our bees ?
