Ocean products have only enriched our diet by a few percent by weight, but they make up 20% of our protein intake. So far, the focus has been on the breeding and development of freshwater fish and saltwater fish only in the first biological phase (after which the fish would leave the fishery and return later, e.g., salmon). New developments in Japan and Israel study the entire life cycle of saltwater fish. The information is still incomplete but growing rapidly. The breeding of these fish in inland saltwater lakes could contribute greatly to the supply of food and protein along the extensive ocean coasts of tropical and subtropical regions.