Under this head I reckon a monster which, by the various names of Fin-Back, Tall-Spout, and Long-John, has been seen almost in every sea and is commonly the whale whose distant jet is so often descried by passengers crossing the Atlantic, in the New York packet-tracks.
In the length he attains, and in his baleen, the Fin-back resembles the right whale, but is of a less portly girth, and a lighter colour, approaching to olive.
His grand distinguishing feature, the fin, from which he derives his name, is often a conspicuous object.
This fin is some three or four feet long, growing vertically from the hinder part of the back, of an angular shape, and with a very sharp pointed end.
Even if not the slightest other part of the creature be visible, this isolated fin will, at times, be seen plainly projecting from the surface.