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Dorsal fin   /dˈɔrsəl fɪn/   Listen
Dorsal fin

noun
1.
Unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance.






WordNet 3.0 © 2010 Princeton University








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"Dorsal fin" Quotes from Famous Books



... here it was cleverly managed by Bacheet, who lugged it out by the tail. It was an ugly monster, of about fifty pounds, a species of silurus, known by the Arabs as the 'coor;' it differed from the silurus of Europe by haviimg a dorsal fin, like a fringe, that extended along the back to the tail. This fish had lungs resembling delicate branches of red coral, and, if kept moist, it would exist upon the land for many hours like an eel. It smelt strongly of musk, but it was gladly accepted by ...
— The Nile Tributaries of Abyssinia • Samuel W. Baker

... especially the broad and open sea. Each species has its especial preference for this or that latitude,—for a certain zone of water, more or less cold. And it was that preference which traced out the great divisions of the Atlantic. The tribe of inferior whales, that have a dorsal fin, are to be found in the warmest and in the coldest seas,—under the line and ...
— Sanders' Union Fourth Reader • Charles W. Sanders

... past beneath, the shoals of tiny fish, and the swift-flying terns, the broad shield of the sea, and the purple mountains. Close to the islet what I took to be the tip of a shark's fin appeared. It seemed to be cutting quick circles, rising and dipping as does the dorsal fin when a shark is closely following, or actually bolting its prey. As the boat approached, the insignia of a voracious shark changed to the spent Ulysses, making forlorn and ineffectual efforts to rise. ...
— My Tropic Isle • E J Banfield

... an almost infinite diversity of colour, we meet with the most extraordinary modifications of structure. Thus, out of about two dozen specimens bought in London, Mr. Yarrell observed some with the dorsal fin extending along more than half the length of the back: others with this fin reduced to only five or six rays: and one with no dorsal fin. The anal fins are sometimes double, and the tail is often triple. This ...
— The Variation of Animals and Plants under Domestication - Volume I • Charles Darwin

... two of the fish of the same kind as the one taken on the 25th. It had a dorsal fin with 14 spines; a ventral fin; a tail, 16 spines; and in addition to these it had four pectoral fins resembling the claws of a frog, which it used much in the same manner that a lizard uses its claws. The ...
— Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2) • George Grey

... bony skeleton, for the primitive vertebral column is hitherto unossified cartilage. This ideal animal, therefore, is to all appearance as much like a worm as a fish, and swims by means of a lateral undulation of its whole body, assisted, perhaps, by a dorsal fin formed out of skin. ...
— Darwin, and After Darwin (Vol. 1 and 3, of 3) • George John Romanes

... 'Algae' of the submerged banks, for which purpose the upper lip is very large, thick, and as it turns down suddenly at right angles with the head, it much resembles an elephant's trunk shorn off at the mouth. Its length averages from eight to fourteen feet; there is no dorsal fin, and the tail is horizontal; colour blue, and white beneath. Its means of propulsion are two paddles, with which it also crawls along the bottom, and beneath which are situated the udders, with teats exactly like a cow's. Its flesh is far from bad, resembling lean beef in appearance, ...
— Australian Search Party • Charles Henry Eden

... times been tried of marking the salmon after spawning and watching for their return in after years. After some experiments, the mode finally fixed upon as best was to attach a light platinum tag to the rear margin of the dorsal fin by means of a fine platinum wire. The tags were rolled very thin, cut about half an inch long and stamped with a steel die. The fish marked were dis missed in the month of November. Every time it was tried a considerable number of them was caught the ensuing spring, but ...
— New England Salmon Hatcheries and Salmon Fisheries in the Late 19th Century • Various

... that seemed to terminate in retractile claws. In the water, these fins would undoubtedly be of tremendous value in swimming and in fighting, but on land they seemed rather useless. Aside from a rudimentary dorsal fin, a series of black, stubby spines, connected by a barely visible webbing, the thing had no other external ...
— The Terror from the Depths • Sewell Peaslee Wright



Words linked to "Dorsal fin" :   fin



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