Giant fish 'verges on extinction'

A river giant vanishes
One of the world's largest freshwater fish is on the verge of going extinct.
A three-year quest to find the giant Chinese paddlefish in the Yangtze river failed to sight or catch a single individual.

That means that the fish, which can grow up to 7m long, has not been seen alive for at least six years.

There remains a chance that some escaped the survey and survive, say experts, but without action, the future of the species is bleak. 
[via]