They’re really in uncharted waters. The coastal country of Indonesia is milking its abundance of fish to compensate for a drastic cow shortage for programs like school lunches. As local fishermen off ...

INDRAMAYU, Indonesia—Grocery aisles are filled with a range of “milk” options, from almond to soy and goat to oat. But have you heard of fish milk?

Indonesia is tackling a cow milk shortage by turning to the sea. 'Fish milk,' not actual milk but protein-rich fish roe, is being processed into a flavored drink for school lunch programs. This ...