The Indo-Pacific fish that farms built before true hatcheries
Chanos chanos is the sole living member of its family and genus, a silvery Indo-Pacific ray-fin that can top nearly two metres yet is usually under one. Southeast Asian ponds raised it for centuries on wild fry; only in the late 1970s did farmers finally spawn captive breeders.
Milkfish range from South Africa to Hawaii and the Marquesas, north to Japan and south to Australia, with a lone 2012 report from the eastern Mediterranean. They favour tropical shelf waters one to thirty metres deep and slip freely into estuaries and rivers. Adults may weigh about nineteen kilograms in ponds and live around fifteen years. Females can release half a million to six million eggs and may spawn more than once a year in warm, shallow sand or reef water at night.
The family Chanidae is ancient, but only this species survives. Fossil Chanos appear in earliest Paleocene Mexico about sixty-three million years ago; early European and North American finds sit in freshwater Eocene beds. Mid-Eocene cooling likely erased Atlantic stocks while Indo-Pacific lines persisted. Today genetic diversity is low even though Hawaiian, Pacific island, Philippine–Taiwan–Indonesian, Thai–Malaysian, Indian, and African groups differ in breeding and migration habits. The IUCN did not list the species as threatened as of 2019, though wild-stock data remain thin.
Cuisine made the bone-dense fish a staple: Filipino boneless bangús and kiniláw, Javanese pressure-cooked bandeng presto, and Taiwanese congee toppings and fish balls. Farmers in the Philippines started pond culture nearly two millennia back; the practice then moved through Indonesian and Taiwanese waters and onward across the Pacific. After unreliable early captive spawns, spontaneous sea-cage spawning in 1980 steadied fry supply. By 2017 Indonesia and the Philippines led production, and milkfish made up about fourteen percent of world aquaculture output—valued for fast growth, hardiness, and high-priced flesh.
Source: Milkfish
