and is one of the most valuable food fishes of Europe, both fresh and smoked, the "finnan haddie" of Scotland being famous.
There are a few species of fresh-water fish, but food-fishes are scarce both in the rivers and along the coast.
The connexion between variations of current strength and the conditions of existence and distribution of plankton are no less important, especially as they act directly or indirectly on the life-conditions of food fishes.
About 500 species of food fishes have been found, and common among them are the bangos or milkfish, the banak or mullet, mackerel, herring, anchovies, groupers, snappers, pompano, tarpon and bonito.
Some 230more or less - marine food fishes are to be found in the market at San Francisco.