Answer: Mocha Dick was the name of an actual sperm whale that was purportedly the model for Melville
Moby-Dick, or, The Whale was published in the United States on November 14, 1851. (It had appeared earlier in London.)
Etching of Joseph O. Eaton’s portrait of Herman Melville (Source: Library of Congress; Public Domain)
Melville’s home Arrowhead is located in the Berkshire region of Massachusetts.
Read more about whales and whaling in Eric Jay Dolin’s Leviathan: The History of Whaling in America.
And read more about Melville and his work in Don’t Know Much About Literature: What You Need to Know But Never Learned About Great Books and Authors.
Don’t Know Much About® Literature (Harper and Random House Audio)