The Ferengi are a fictional alien species from the Star Trek universe, known for their strong emphasis on commerce and profit. They are characterized by their large ears, which are considered a sign of their sensitivity to profit-making opportunities. The Ferengi culture is governed by the Ferengi Rules of Acquisition, a set of guidelines that dictate their business practices and ethical standards. In the Star Trek series, the Ferengi often serve as comic relief, showcasing their greed and cunning in various storylines. They are typically portrayed as shrewd traders and negotiators, often engaging with other species in pursuit of wealth. Despite their focus on profit, some Ferengi characters, like Quark, display more complex personalities and moral dilemmas.