Few persons will taste of a blue shark, it being considered unwholesome; but of the brown shark, which rarely exceeds five feet in length, (while the former has been known to measure near thirty,) most of the seamen will solicit a steak. The average sizes of sharks may be from six to twelve feet in length: it is very common to collect a pailful of young ones, each about a foot long, that take refuge in the parent’s maw. Behind the fins are usually several sucking-fishes, adhering to the shark’s sides: these are supposed to live upon its blood; but some doubts may be entertained, at least whether that is its sole subsistence, when I state, that in Madras Roads I caught, by means of a hook and line put out for ground fishes, a sucking-fish that measured rather more than two feet.
Sharks are in general attended by what are called pilot-fishes: these are beautifully striped blue and white; in form they much resemble the chub, and may measure from ten to fifteen inches in length. When the shark displays himself, the pilot-fishes may be seen playing about his head and sides; but when the ship is going fast, and the shark keeps under the bottom, or stern, at a considerable depth, the pilot-fishes often rise to the surface, assembling in the eddy about the stern-post. I never could entice one of them to touch a bait.
In the higher latitudes, the albacore, boneta, dolphin, &c. may often be seen playing about the ship in great numbers; sometimes as though intent on keeping company for scores of miles. Porpoises are yet more familiar, and delight in preceding the ship, at a few yards distance; affording, to those who are expert, excellent opportunities for striking them with harpoons. The liver of the porpoise is esteemed by many to be as good as that of a pig; to which it bears some resemblance; the body of the fish is by no means palatable. The flesh of the dolphin is extremely dry, as is that of the boneta, which is commonly replete with small white animalculæ, not unlike short fat maggots. The albacore is inconceivably rapacious; often springing several yards out of the water after the flying-fishes, as they skim above the surface; which they sometimes do for full two hundred yards; their great enemy darting along under their course with incredible velocity, and rarely failing to make a prey of one, or more, as they fall into the water in an exhausted state.