Please help with homework Moby-Dick: In “Stubb’s Supper,” Stubb instructs “Fleece,” the ship’s aged black cook

In “Stubb’s Supper,” Stubb instructs “Fleece,” the ship’s aged black cook, to preach to the sharks feasting noisily on the remains of a whale tied alongside the Pequod. Fleece exhorts them to “Stop dat dam smackin’ ob de lip!” and to curb their voraciousness. He concludes that “if you gobern de shark in you, why den you be angel; for all angel is not’ing more dan de shark well goberned.” An example of Melville’s comic genius, how does Fleece’s sermon to the sharks relate to the larger themes of the novel? What other instances of comedy do you find in Moby-Dick? Of a satiric treatment of Christianity?