Nassau grouper
/ˌnasɔː ˈɡruːpə/noun
A large striped serranid food fish, Epinephelus striatus, found in the Caribbean Sea, Gulf of Mexico, and western Atlantic (from North Carolina to Brazil), and noted for its colour-changing ability.
Origin
Late 19th century; earliest use found in The Century Dictionary. From the name of Nassau, capital city of the Bahamas + grouper.