The Mackerel. The Mackerel is one of the most useful as well as one of the most beautiful of familiar fishes. It measures from twelve to twenty inches and weighs from one and a half to two or three pounds. It is elegant of form and brilliant of colour, as well as agreeable as an article of food. Mackerel visit the coast of England in vast shoals at certain seasons, but retire to deep seas for the winter. They are exceedingly voracious, and prey upon the herrings; Captain Brown tells a story of a number of mackerel fastening on to a sailor who had plunged into their midst for a bath. The man was rescued by his comrades, but he died soon after from loss of blood.
The Sword-fish. The Sword-fish is a formidable member of this order. It is found in the Mediterranean, and the Atlantic, and sometimes visits the English coast. It has been known to measure ten feet or more without the sword, with which it attains even to a length of fifteen feet. It attacks other large fish and is a great enemy to the whale, which it charges with great force and destructive effect. It is said sometimes to mistake the hull of a ship for the body of a whale and to charge it accordingly, with the result that it leaves its sword fixed in the ship's timbers as the bee leaves its sting in human flesh. The sword of this fish is formed by the elongation of its upper jaw, and some idea of the force with which it can be used may be gained from the fact that one found in the hull of a ship at Liverpool and described by Scoresby had penetrated a sheet of copper, an oak plank two and a half inches in thickness, a solid oak timber of seven and a half inches, and another plank also of two inches. "The position of the bone was at the distance of four feet horizontally from the stern, and two feet below the surface of the water when the vessel was afloat. Hence, it appeared, that when the ship had been in rapid progress through the water, she had been met with and struck by a sword-fish advancing in an opposite direction, by the shock of which, or by the action of the water forced past the body of the animal by the vessel's progress, the snout had been broken off and detached. The blow, though it must have been singularly forcible, was not observed by any person in the ship. Had the bone been withdrawn, the vessel would probably have foundered." Mr. Wood says in one instance, a Sword-fish attacking a whaling-ship, drove its weapon "through the copper sheathing, an inch board sheathing, a three-inch plank of hard wood, the solid white oak timber of the ship twelve inches thick, through another two-and-a-half inch hard oak ceiling plank, and lastly, perforated the head of an oil-cask, where it still remained immovably fixed, so that not a single drop of oil escaped."
The Cod. The third order of Dr. Günther's classification includes many of the more familiar fishes. Here we find the Cod, the Haddock, the Plaice, the Flounder, the Halibut, the Turbot, the Brill, and the Sole. Of these we will take the Cod as representative. The Cod is one of the most prolific of fish. Enormous quantities are caught and consumed every year, and yet the number seems to increase rather than decrease. This is accounted for by the fact, that the spawn of one fish will sometimes contain nine millions of eggs. The Cod frequents the deep seas of the temperate and colder climes, not being found in any quantities north of Iceland, or South of Gibraltar. They are found chiefly in the Northern Atlantic where extensive fisheries are carried on, but they are also caught in the Firth of Forth at the mouth of which some of the best are taken. The Cod grows very rapidly and often to a great size. One is said to have been caught off Scarborough many years ago which weighed seventy-eight pounds and measured five feet eight inches in length. They feed on herrings, sprats, mollusca, worms, and small shell-fish, are very voracious, and have excellent digestions. Captain Brown killed one at Killough, Co. Down, Ireland in which he found upwards of fifty small crabs, and other testaceous and crustaceous animals. The Cod fisheries find employment for a large number of people and are a great source of profit. The flesh is highly valued as an article of diet, and the liver for the properties of the oil which it produces, while other parts are used for various purposes.
The Salmon. In the Fourth order of Dr. Günther's classification we find the Salmon, the Trout, the Pike, the Flying Fish, the Carp, the Roach, the Chub, the Herring, the Sardine, the Anchovy, the Gymnotus and the Eel, besides other fish. Of these the Salmon takes easy precedence. Izaak Walton called it "the King of fresh water fish," and many have accorded it the first place among its kind for the delicacy of its flavour. It is of migratory habits, leaving the sea in the autumn and ascending rivers for the purpose of depositing its spawn, and returning to the sea in the spring. In seeking suitable places for its purpose the salmon brooks no obstacle, leaping with great vigour the rapids and falls that impede its course even though they may sometimes exceed eight or ten feet in height. Curving the body until it forms a circular spring, it strikes the water with great force throwing itself forward and thus lifting itself over rocks and weirs. In the shallow gravelly pools which they find towards the source of rivers, Salmon form hollows in which they spawn, covering up their eggs with the loose sand they excavate in the process. The eggs deposited in the later months of the autumn are hatched in the earlier months of Spring and by the end of May the whole of the young fish have followed their parents to the sea.
The Pike. The Pike,—fierce, strong, and voracious,—holds his own in the rivers of both the old and the new Worlds. It has been known to attack a man when its retreat has been cut off; to bite the legs of bathers, and to snap at the fingers of persons cooling their hands in the water; and when pressed with hunger, to fight an otter for the possession of a carp, which the latter had caught. Its strength and endurance have often been demonstrated in the destruction of strong tackle and in its power to survive, without apparent inconvenience, with hooks and wires mingling with its anatomy. Captain Brown gives an instance of a pike being caught, which had a strong piece of twisted wire projecting from its side. It was in excellent condition, and on being opened, discovered in its stomach a double eel hook, much corroded, and attached to the protruding wire. Another pike when caught, in the river Ouse, was found in possession of a watch with a black ribbon and seals attached; property which it was afterwards discovered had belonged to a gentleman's servant who had been drowned. The pike has often been caught with portions of tackle broken from the line in former engagements hanging from the mouth. Its rapacity is extraordinary. Eight-hundred gudgeon are said to have been consumed in three weeks by eight pike of not more than five pounds weight each. "The appetite of one of my pike," says Mr. Jesse, "was almost insatiable. One morning I threw to him one after the other, five roach, each about four inches in length. He swallowed four of them, and kept the fifth in his mouth for about a quarter of an hour, when it also disappeared." The pike attains to large proportions and to a great age. When less than two pounds weight, it is called a jack, but it has been known to attain to sixty or seventy pounds weight, and if all records be true, to more than a hundred years of age. Gesner mentions a pike caught in standing water at Heilbroon, in Suabia in 1497 which had a ring round its head with an inscription in Greek which ran somewhat as follows; I am the first fish that was launched into this pond, and was thrown in by Frederick the Second, emperor of the Romans, on the fifth of October, 1230." If this be true, the pike was two hundred and fifty-seven years old at the time of its capture, when it is said to have weighed three hundred and fifty pounds.
The Herring. Probably no living thing of its size is equal to the herring in its value to man. It visits the northern coasts of England and Scotland in vast shoals, of several miles in extent, in the autumn of the year, heralded by seagulls and followed by dog-fish, both of whom take toll as it proceeds. The annual produce of these little fish is beyond all calculation. The Scotch fisheries are credited with the capture of over four hundred millions a year, while those of Norway can scarcely be much less successful. The Swedish fisheries are said to capture nearly double that number, to which must be added those taken by the English, Irish, Dutch, French, and German fisheries before the grand total can be reached. The enormous number of hands employed in these various fisheries, to say nothing of the capital invested in them, marks them out as one of the most important of European enterprises.
The Flying Fish. The Flying fish is about the size of a herring, and is furnished with strong pectoral fins, almost the length of its body, by which it is able to spring out of the water and sustain itself for a time in the air. It has apparently no power of guiding itself, or of varying its altitude while in the lighter element, both the height and the course of its flight being determined by the direction and the force of its spring. Its ordinary flight is about three feet above the surface of the water, and of no very great distance or duration, but it has been known to fly as high as fourteen or fifteen feet, and even higher, and a distance of over two hundred yards. Flying fish often fall upon the decks of ships, where they are welcomed as affording a pleasant variety to the sailors' menu. They frequent warmer latitudes, but are sometimes seen off the English coast. They leave the sea to escape the larger fish which prey upon them, only too often to fall a prey to the fowls of the air.
The Eel. The Eel from its general resemblance to the snake is not usually a favourite when alive, however popular it may be with the palate, when served up with suitable accessories at table. It is, however, full of interest as a study, and shows many remarkable characteristics and traits. It migrates from the river to the sea in the autumn to produce its young, thus reversing the order of procedure of the salmon. Mr. Jesse, writing of these migrations as observed by him in the Thames many years ago, says, "An annual migration of young eels takes place in the river Thames in the month of May, and they have generally made their appearance at Kingston, in their way upwards, about the second week in that month. These young eels are about two inches in length, and they make their approach in one regular and undeviating column of about five inches in breadth, and as thick together as it is possible for them to be. As the procession generally lasts two or three days, and as they appear to move at the rate of nearly two miles and a half an hour, some idea may be formed of their enormous number. Sir Humphrey Davy says, in his "Salmonia,"—"There are two migrations of eels, one from and the other to the sea; the first in spring and summer, and the second in autumn, or early in winter. The first of very small eels, which are sometimes not more than two and a half inches long; the second of large eels, which sometimes are three or four feet long, and weigh from fifteen to twenty pounds. There is great reason to believe, that all eels found in fresh water are the results of the first migration; they appear in millions in April and May, and sometimes continue to rise as late as July, and the beginning of August. They feed, grow, and fatten in fresh water. In small rivers, they are seldom very large; but, in large deep lakes, they become as thick as a man's arm, or even leg; and all those of a considerable size attempt to return to the sea in October or November, probably when they experience the cold of the first autumnal rains." Mr. St. John thus describes some young Eels which he saw ascending the river Findhorn "When they came to a fall, which they could not possibly ascend, they wriggled out of the water, and gliding along the rock, close to the edge, where the stone was constantly wet from the splashing and spray of the fall, they made their way up till they got above the difficulty, and then again slipping into the water, continued their course." The eel is voracious, and will leave the water in search of frogs, and other food. It will attack, and appropriate, young ducks, and one is said to have been caught near Bootle with two rats in its stomach. The Conger Eel grows to a great size and attains great weight. It is said sometimes to measure eight or even ten feet, and to weigh a hundred pounds or even more. It is plentiful in the English Channel, and on the coast of Cornwall.
The Gymnotus. The Gymnotus is the famous electric eel, and like the Torpedo of the English Channel and the Mediterranean, has the power of communicating a violent electric shock. It belongs to the Amazon and other South American rivers and their tributaries, and is well known to American Indians. Humbolt describes the shock produced by this creature, as exceeding in strength that of a large Leyden jar. Having imprudently placed his foot on one just taken from the water he received such a shock that, he says, "I was affected the rest of the day with violent pains in the knees, and in almost every joint."
Catching the Gymnotus. The following vivid description of a Gymnotus hunt is given by Humbolt: "We at first wished to make our experiments in the house we inhabited at Calabozo; but the dread of the electrical shocks of the gymnoti is so exaggerated among the vulgar, that during three days we could not obtain one, thought they are easily caught, and though we had promised the Indians two piastres for every strong and vigorous fish.