We took in the little guys, but the big fish got away.The big fish ordered the killing.
Idiom
big fish
informal an important or powerful person in a group or organization.
Mrs Coughlin is one of the directors - a big fish.
big fish
noun a very important person or thing US, 1836
a big fish
An important, successful, or influential person. Meeting a big fish like the company's CEO can be quite an intimidating experience for an intern.I'd rather be a big fish in a small pond than move to New York City and be a nobody!
big fish
n. the boss; the leader. (Underworld.) We took in the little guys, but the big fish got away.