The most common system for the culture of milkfish is in brackish-water
coastal pond farms (fig. 21.7). The farm may include nurseries and rearing
ponds, with wintering ponds where the fingerlings have to be over-wintered, as
in Taiwan. Some farmers specialize in the production of fry and fingerlings
only, in which case rearing ponds may be omitted. Another type of farm has only
rearing ponds of different sizes. The farmer buys fry or fingerlings from fry
producers and devotes his farm only to raising marketable fish.
Though intended to be monoculture, brackish-water milkfish ponds become
polyculture systems as the tidal water brings in early stages of a number of
other species, the more important of which are the grey mullets, shrimps and
sea-bass (Lates calcarifer).
As in the case of mullets, milkfish are some-times grown in fresh-water
ponds or stocked in lakes and reservoirs. But the more important milkfish
farming in fresh waters is the pen farming that has developed in lakes in the
Philippines (Laguna de Bay and Lake Sampaloc).