Salmon, the noblest and richest fish taken in fresh water—the largest are the best. They are unlike almost every other fish, are ameliorated by being 3 or 4 days out of water, if kept from heat and the moon, which has much more injurious effect than the sun.
In all great fish-markets, great fish-mongers strictly examine the gills—if the bright redness is exchanged for a low brown, they are stale; but when live fish are bro't flouncing into market, you have only to elect the kind most agreeable to your palate and the season.