Thirty million tons of fish caught annually worldwide are made into meal to feed to farm animals and farmed fish, according to a study co-authored by Enric Sala (2005), Rashid Sumaila (2009), and their colleagues. Finding an alternative would significantly reduce pressure on the world's fisheries, the authors say.
Standards for making shellfish farming sustainable have been released by the Bivalve Aquaculture Dialogue of the World Wildlife Fund. Shellfish producers, scientists, and conservationists are among the stakeholders who took part. 
