A Week on the Concord and Merrimack Rivers by Henry David Thoreau (literature books to read TXT) 📕

fishes wherever there is a fluid medium, and even in clouds and in melted metals we detect their semblance. Think how in winter you can sink a line down straight in a pasture through snow and through ice, and pull up a bright, slippery, dumb, subterranean silver or golden fish! It is curious, also, to reflect how they make one family, from the largest to the smallest. The least minnow that lies on the ice as bait for pickerel, looks like a huge sea-fish cast up on the shore. In the waters of this town there are about a dozen distinct species, though the inexperienced would expect many more.

It enhances our sense of the grand security and serenity of nature to observe the still undisturbed economy and content of the fishes of this century, their happiness a regular fruit of the summer. The Freshwater Sunfish, Bream, or Ruff, Pomotis vulgaris, as it were, without ancestry, without posterity, still represents the Freshwater Sunfish in nature. It is the most common of all, and seen on every urchin’s string; a simple and inoffensive fish, whose nests are visible all along the shore, hollowed in the sand, over which it is steadily poised through the summer hours on waving fin. Sometimes there are twenty or thirty nests in the space of a few rods, two feet wide by half a foot in depth, and made with no little labor, the weeds being removed, and the sand shoved up on the sides, like a bowl. Here it may be seen early in summer assiduously brooding, and driving away minnows and larger fishes, even its own species, which would disturb its ova, pursuing them a few feet, and circling round swiftly to its nest again: the minnows, like young sharks, instantly entering the empty nests, meanwhile, and swallowing the spawn, which is attached to the weeds and to the bottom, on the sunny side. The spawn is exposed to so many dangers, that a very small proportion can ever become fishes, for beside being the constant prey of birds and fishes, a great many nests are made so near the shore, in shallow water, that they are left dry in a few days, as the river goes down. These and the lamprey’s are the only fishes’ nests that I have observed, though the ova of some species may be seen floating on the surface. The breams are so careful of their charge that you may stand close by in the water and examine them at your leisure. I have thus stood over them half an hour at a time, and stroked them familiarly without frightening them, suffering them to nibble my fingers harmlessly, and seen them erect their dorsal fins in anger when my hand approached their ova, and have even taken them gently out of the water with my hand; though this cannot be accomplished by a sudden movement, however dexterous, for instant warning is conveyed to them through their denser element, but only by letting the fingers gradually close about them as they are poised over the palm, and with the utmost gentleness raising them slowly to the surface. Though stationary, they keep up a constant sculling or waving motion with their fins, which is exceedingly graceful, and expressive of their humble happiness; for unlike ours, the element in which they live is a stream which must be constantly resisted. From time to time they nibble the weeds at the bottom or overhanging their nests, or dart after a fly or a worm. The dorsal fin, besides answering the purpose of a keel, with the anal, serves to keep the fish upright, for in shallow water, where this is not covered, they fall on their sides. As you stand thus stooping over the bream in its nest, the edges of the dorsal and caudal fins have a singular dusty golden reflection, and its eyes, which stand out from the head, are transparent and colorless. Seen in its native element, it is a very beautiful and compact fish, perfect in all its parts, and looks like a brilliant coin fresh from the mint. It is a perfect jewel of the river, the green, red, coppery, and golden reflections of its mottled sides being the concentration of such rays as struggle through the floating pads and flowers to the sandy bottom, and in harmony with the sunlit brown and yellow pebbles. Behind its watery shield it dwells far from many accidents inevitable to human life.

There is also another species of bream found in our river, without the red spot on the operculum, which, according to M. Agassiz, is undescribed.

The Common Perch, Perca flavescens, which name describes well the gleaming, golden reflections of its scales as it is drawn out of the water, its red gills standing out in vain in the thin element, is one of the handsomest and most regularly formed of our fishes, and at such a moment as this reminds us of the fish in the picture which wished to be restored to its native element until it had grown larger; and indeed most of this species that are caught are not half grown. In the ponds there is a light-colored and slender kind, which swim in shoals of many hundreds in the sunny water, in company with the shiner, averaging not more than six or seven inches in length, while only a few larger specimens are found in the deepest water, which prey upon their weaker brethren. I have often attracted these small perch to the shore at evening, by rippling the water with my fingers, and they may sometimes be caught while attempting to pass inside your hands. It is a tough and heedless fish, biting from impulse, without nibbling, and from impulse refraining to bite, and sculling indifferently past. It rather prefers the clear water and sandy bottoms, though here it has not much choice. It is a true fish, such as the angler loves to put