Moby-Dick; or, The Whale

respect does the whale differ from other fish. Above, Linnæus has given
you those items. But in brief, they are these: lungs and warm blood;
whereas, all other fish are lungless and cold blooded.

Next: how shall we define the whale, by his obvious externals, so as
conspicuously to label him for all time to come? To be short, then, a
whale is _a spouting fish with a horizontal tail._ There you have him.
However contracted, that definition is the result of expanded
meditation. A walrus spouts much like a whale, but the walrus is not a
fish, because he is amphibious. But the last term of the definition is
still more cogent, as coupled with the first. Almost any one must have
noticed that all the fish familiar to landsmen have not a flat, but a
vertical, or up-and-down tail. Whereas, among spouting fish the tail,
though it may be similarly shaped, invariably assumes a horizontal
position.

By the above definition of what a whale is, I do by no means exclude
from the leviathanic brotherhood any sea creature hitherto identified
with the whale by the best informed Nantucketers; nor, on the other
hand, link with it any fish hitherto authoritatively regarded as
alien[3]. Hence, all the smaller, spouting, and horizontal tailed fish