The Dab is distinguished from the other flat Fish by having very hard scales on its body, and the Halibut has the distinction of being the largest of this class of flat Fish. It is occasionally caught in the seas of Northern Europe and Greenland, measuring seven feet, and weighing from three to four hundred pounds. The body of the Halibut is more elongated than that of the Plaice or Flounder, and its jaws are armed with strong and pointed teeth.
The natives of Greenland fish for the Halibut with an implement which they call gangnaed. It is composed of a hempen cord five or six hundred yards in length, to which are attached about thirty smaller cords, each furnished with a barbed hook at the end. The larger cord is attached to floating planks, which act as trimmers, indicating the place of this destructive contrivance. At the end of twenty-four hours these lines are drawn from the water, and it is not unusual to find five or six large Halibut caught on the hooks.
Another mode of catching this and other flat Fish is to spear them on their sandy beds. No rule is laid down for this method of fishing; in some places it is carried on successfully by means of a common pitchfork. In other places a fine spear is used for the purpose—very long and with sharp prongs.
THE THIRD GROUP OF SOFT-FINNED FISHES.
This includes the well-known Fishes—of which the Cod-fish is the type—so commonly found on our tables. They are characterized by their pointed fins, and grouped according to the position of these fins. The body is long and slightly compressed; the head well proportioned. Their fins are soft and their scales are small and soft. The majority of these Fishes are too well known to require further description. According to the position of their fins we find forming one of the smaller groups—the Cod, the Whiting and the Haddock. In another small group is the Salmon and the Trout. A third group includes the Pike, and several curious relatives—the Stomias, Flying-fish and the Chetedon. And a fourth includes the Herring, Ancovy, Pilchard, Sprat and Shad.
THE CHEATODONS.
CHAETODON.
These Fish form a very curious species. They are brilliantly colored and marked with odd stripes. Their head is large, with small eyes placed near the top; the nose and the mouth of some species are very curiously formed; and the tail—which is not divided—also shows strange forms in some varieties.
One of the best known is the Bow-banded Chaetodon. The ground color of this Fish is brown, which shades to black towards the back, and looks as though covered with velvet and inlaid with ivory, and the light stripes in the form of a bow, on both sides of the body give it still more showy appearance. This species inhabits the coasts of Brazil, and other parts of South America, and grows from three to six inches in length. Other varieties are somewhat larger, but they are all comparatively small Fish.