Process for producing proteinous material

A process for producing a proteinous material which comprises coarsely grinding fish bodies including bones and/or shells, from which the internals had been removed optionally together with heads and/or skins, removing fat as from the coarsely ground fish bodies, and either (1) fermenting said coarsely ground fish bodies with an enzyme and/or a microorganism, inactivating said enzyme and/or microorganism and then finely grinding the fermented material to give a particle size of bones and/or shells of 100.mu. or less;

• or (2) finely grinding said coarsely ground fish bodies to give a particle size of bones and/or shells of 100.mu. or less, fermenting the same with an enzyme and/or a microorganism and then inactivating said enzyme and/or microorganism;
• or (3) finely grinding said coarsely ground fish bodies to give a particle size of bones and/or shells of 100.mu. or less while fermenting the same with an enzyme and/or a microorganism and then inactivity said enzyme and/or microorganism.