The harvest of animals and plants from the ocean to provide food and recreation for people, food for animals, and a variety of organic materials for industry. It is now generally agreed that the world catch is approaching a maximum, which may be less than 100,000,000 metric tons per year. If methods can be devised to harvest smaller organisms not heretofore used because they have been too costly to catch and process, it has been estimated that the yield could perhaps be increased severalfold. Russia is said to have succeeded in developing an acceptable human food product from Antarctic krill.