Fishermen drive bottle-nose dolphins into a net during their annual hunt off Taiji, Wakayama Prefecture (state), Japan, Thursday, Sept. 2, 2010. The Japanese government allows a hunt of about 20,000 dolphins a year, and argues that killing them, and also whales, is no different from raising cows or pigs for slaughter. (AP Photo/Kyodo News) ** JAPAN OUT, MANDATORY CREDIT, FOR COMMERCIAL USE ONLY IN NORTH AMERICA **AP – Japanese fishermen herded dolphins into a cove made famous by an Oscar-winning documentary about the hunt but did not kill any Friday, as conservationist groups ramped up scrutiny of the annual slaughter.