Cambodia Fisheries personnel weigh a 50-kg and 1.5-meter Mekong giant catfish (known among Cambodians as "the king of fish") before releasing it back into the Mekong river June 14, 2005. Four giant catfish have been released back into the wild in Cambodia to try to boost numbers of the species thought to be on the verge of extinction, a wildlife conservation group said Tuesday. REUTERS/Chor Sokunthea DCS/DY