As the cost of fish oil continues to rise, Australian aquaculture operators are looking for safe and more sustainable sources for healthy formulated feed in order to expand commercial production of the popular yellowtail kingfish. As the cost of fish oil continues to rise, Australian aquaculture operators are looking for safe and more sustainable sources for healthy formulated feed in order to expand commercial production of the popular yellowtail kingfish. Ecology Agriculture Phys.org – latest science and technology news stories