When we hear the phrase "big fishes", we usually think of powerful and influential people who have a high level of control and authority. However, there are several synonyms for this phrase that can be used interchangeably to convey the same meaning. Some of these synonyms include heavyweights, top dogs, big shots, high rollers, and key players. Each of these phrases emphasizes the prominence and impact that these individuals have within their respective fields. No matter which synonym is used, the underlying message remains the same - these are individuals with significant power and influence that cannot be ignored.