Salmon are natural carnivores. In the wild, they eat insects, insect larvae, small herring, crustaceans, and animal plankton. However, in farming, salmon are also fed seafood-based feed, making production dependent on resource-intensive fishmeal and fish oil. Salmon are natural carnivores. In the wild, they eat insects, insect larvae, small herring, crustaceans, and animal plankton. However, in farming, salmon are also fed seafood-based feed, making production dependent on resource-intensive fishmeal and fish oil. Cell & Microbiology Agriculture Phys.org – latest science and technology news stories