Fish processed in Zhejiang factories
yielded 0–2% fish oil, depending on the particular mix of fish
being used, and around 20% fishmeal, with protein levels of around
60% in the final fishmeal product. Not all fish used by these companies
have suitable quantities of oil; oil can be extracted from anchovies and
processing byproducts, whereas lanternfish have no usable oil. In
addition, fishmeal production facilities utilize fish from various sources
to achieve targeted protein levels.