Hey Agustín, We have an term that is somewhat similar in English. Instead, we use the term "fat cat" to describe someone of high status or great political influence. Additionally the term "fat cat" often implies someone that wields their wealth or influence in an unsavory (morally unpleasant) way. fat cat in American English noun slang 1. a wealthy person from whom large political campaign contributions are expected 2. any wealthy person, esp. one who has become rich quickly through questionable dealings 3. an important, influential, or famous person 4. a person who has become lazy or self-satisfied as the result of privilege or advantage

Hi Agustín! We have a lot of idioms in English that use "fish" as a theme. I'll share a few. "A fish out of water." When someone is uncomfortable or awkward in a situation. For example: The native speakers of Spanish were talking at lightning speed during the debate. How did Terry make out? He was "like a fish out of water." "Fishing for information." When someone is asking questions in order to get particular answers about something. For example: She's asking a lot of questions; what's going on? Oh, she's just "fishing for information." "Fishy" When one questions the truth about something especially if it sounds suspiciously untrue. For example: The phone salesperson said that if you give them your credit card number then you will get a free cellphone? That sounds very "fishy" to me.

¡Qué curioso! En inglés tambien peudes decir "a big fish". Una refrán parecido pero no igual es "a big fish in a small pond" que indica alguien importante en un pueblecito, por ejemplo.