Bob Schwartz

You cannot look at it [Black Grouper fish] long without feeling that you are witnessing something spectral and unnatural, so brilliant is its power to deceive. From being black it can become instantly white; from being an earth-colored brown it can fade into a delightful water-colored green. Its markings change as the clouds of the sky. One marvels at the variety and subtlety of its power.
–The Financier by Theodore Dreiser

 
The Financier (2012) is a novel about a creature of the Gilded Age, the first book in Theodore Dreiser’s Trilogy of Desire.

In it, Frank Cowperwood, a ruthless Philadelphia businessman, rises from a modest background to become a powerful financier in the mid-19th century. He manipulates city funds, builds a street railway empire, and ultimately faces financial ruin and imprisonment after a market crash that exposes his misuse of public money. Cowperwood is based on real-life robber baron Charles Yerkes.

Dreiser compares Cowperwood to the Black Grouper, a fish remarkable for its ability to blend in and adopt any appearance necessary to survive:

Concerning Mycteroperca Bonaci

There is a certain fish, the scientific name of which is Mycteroperca Bonaci, its common name Black Grouper, which is of considerable value as an afterthought in this connection, and which deserves to be better known. It is a healthy creature, growing quite regularly to a weight of two hundred and fifty pounds, and lives a comfortable, lengthy existence because of its very remarkable ability to adapt itself to conditions. That very subtle thing which we call the creative power, and which we endow with the spirit of the beatitudes, is supposed to build this mortal life in such fashion that only honesty and virtue shall prevail. Witness, then, the significant manner in which it has fashioned the black grouper. One might go far afield and gather less forceful indictments—the horrific spider spinning his trap for the unthinking fly; the lovely Drosera (Sundew) using its crimson calyx for a smothering-pit in which to seal and devour the victim of its beauty; the rainbow-colored jellyfish that spreads its prismed tentacles like streamers of great beauty, only to sting and torture all that falls within their radiant folds. Man himself is busy digging the pit and fashioning the snare, but he will not believe it. His feet are in the trap of circumstance; his eyes are on an illusion.

Mycteroperca moving in its dark world of green waters is as fine an illustration of the constructive genius of nature, which is not beatific, as any which the mind of man may discover. Its great superiority lies in an almost unbelievable power of simulation, which relates solely to the pigmentation of its skin. In electrical mechanics we pride ourselves on our ability to make over one brilliant scene into another in the twinkling of an eye, and flash before the gaze of an onlooker picture after picture, which appear and disappear as we look. The directive control of Mycteroperca over its appearance is much more significant. You cannot look at it long without feeling that you are witnessing something spectral and unnatural, so brilliant is its power to deceive. From being black it can become instantly white; from being an earth-colored brown it can fade into a delightful water-colored green. Its markings change as the clouds of the sky. One marvels at the variety and subtlety of its power.

Lying at the bottom of a bay, it can simulate the mud by which it is surrounded. Hidden in the folds of glorious leaves, it is of the same markings. Lurking in a flaw of light, it is like the light itself shining dimly in water. Its power to elude or strike unseen is of the greatest.

What would you say was the intention of the overruling, intelligent, constructive force which gives to Mycteroperca this ability? To fit it to be truthful? To permit it to present an unvarying appearance which all honest life-seeking fish may know? Or would you say that subtlety, chicanery, trickery, were here at work? An implement of illusion one might readily suspect it to be, a living lie, a creature whose business it is to appear what it is not, to simulate that with which it has nothing in common, to get its living by great subtlety, the power of its enemies to forefend against which is little. The indictment is fair.

Would you say, in the face of this, that a beatific, beneficent creative, overruling power never wills that which is either tricky or deceptive? Or would you say that this material seeming in which we dwell is itself an illusion? If not, whence then the Ten Commandments and the illusion of justice? Why were the Beatitudes dreamed of and how do they avail?