Stránka:roll 1911.djvu/128

of the sturgeons, and the Atlantic salmon, all of which go back to sea after spawning, and the Pacific salmons(five species), all of which die after spawning. Of the catadromous fishes there is a single example in our waters- the common eel. It spend? most of it? life in the fresh waters and some- times becomes perman- ently landlocked there, and runs down to the sea to spawn, laying its eggs off shore in deep water. Marine Fish The marine fishes that axe found in the coastal waters of the United Stat?s number many hundred species, ?ome of them of great value as food. Among the most important are cod, haddock, hake, halibut, floun- der, herrLag, bluefish, mackeral, weakfish or aqueteague, m u 11 e t, snapper, drum, and rock fishes. Studying Fish The study of living f?es is most entertain- ing and is rendered somewhat difficult by the medium in which they live, by their Woodcraft Yellow perch Pomolob?t? The alewife or river herring Micropterus salmoides Large-mouth black bass Notropis kudsonius Minnow or ?hiner Acipenser oxyr ,c? ?b?s? ]'he Atlantic sturgeon